Why Do We Catch a Cold More Often in Winter
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Every winter the same pattern repeats. One person in the house starts sneezing, then another, then a third. At school, half the class seems to have a blocked nose. At work, someone is coughing in every room. It feels as if the cold weather itself is making people ill, and many people say exactly that: “I caught a cold because it was cold outside.” It is an old idea, and it feels true, because colds and cold weather arrive together every year. But the full story is more interesting than that, and it is worth understanding, because it changes what you can actually do about it.
The short answer is that cold weather alone does not give you a cold. A cold is caused by germs, tiny viruses that pass from one person to another, most often through the air when someone coughs or sneezes, or through hands that touch a surface and then touch a face. You cannot catch a cold from cold air alone, any more than you can catch one from a cold drink. What winter does is make it much easier for those viruses to travel, to survive, and to find their way into your nose and throat. Winter changes where we spend our time, how dry the air is, how our noses work, and how our bodies cope with short days and long nights. All of those changes, added together, are why colds are more common in winter.
This article explains those changes in plain words: why viruses spread more easily in winter, why spending time indoors matters, what dry air does to your nose, why children bring colds home from school, and why some people seem to catch every cold that goes around while others escape. It also clears up the common misunderstandings about cold weather and colds. This is general information only, not personal medical advice. If a cold worries you, or it does not get better, a health professional is the right person to ask.
The Cold Is Not Caused by Cold Weather Alone
It helps to start with what a cold actually is. A cold is an infection of the nose and throat, caused by a virus. There are many different cold viruses, and the most common group is called rhinoviruses, but there are others too. When a virus gets into your nose, it settles in the lining, the soft, wet skin inside your nose, and it starts to make copies of itself. Your body notices the invasion and responds with sneezing, a runny nose, a sore throat, and sometimes a mild fever. Those symptoms are not the virus itself. They are your body’s way of fighting it and pushing it out.
That means a cold always starts with a virus reaching you from another person, or from a surface that an ill person touched. Cold air cannot create a virus out of nothing. If you sit alone in a cold room, with no virus around you, you will feel cold, and you may shiver, but you will not catch a cold. People who work outdoors in winter, in cold places, do not catch colds from the air itself. They catch them from the people they meet, in the same way anyone else does. The cold weather is part of the setting, not the cause.
So why does it feel so strongly as if the cold causes the cold? Partly because the two arrive together. Winter brings cold weather, and winter also brings more colds, so it is natural to link them. Partly because being cold can make you feel worse when you already have a cold. A cold nose, a chill, and a draughty room can make a sore throat feel sorer and a blocked nose feel more blocked. And partly because an old idea, repeated for generations, is hard to let go of. Grandparents said it, parents said it, and it sounds like common sense. But common sense is not always right, and in this case the science tells a different story: the virus is the cause, and winter is the season that helps the virus do its work.
That distinction matters, because it changes what helps. If cold air alone caused colds, then staying warm would be enough to prevent them. But staying warm does not stop a virus from travelling from one person to another in a crowded, warm room. What helps is reducing the chances of the virus reaching you, and keeping your body in good shape to fight it when it does. That is why the advice that actually works in winter is about hands, air, rest, and crowded places, not just about wearing a thicker coat.
Why Germs Spread More Easily in Winter
One reason colds spread more in winter is that the viruses themselves survive better in cold, dry air. In warm, humid summer air, the tiny droplets that carry a virus when someone coughs or sneezes tend to fall to the ground quickly, or to dry out in a way that makes the virus less able to infect. In cold, dry winter air, those droplets stay in the air longer, and the virus inside them stays alive longer. That gives it more time to be breathed in by someone else. It is a small difference in each breath, but across a whole winter, with millions of breaths, it adds up to many more infections.
There is also the question of how many viruses are around. In winter, more people are ill at the same time, so there are more viruses in the air, on door handles, on shared phones, and on every surface that many hands touch. A bus seat, a school desk, a shop counter, a lift button: in summer, these surfaces may carry few cold viruses. In winter, when many people are coughing and sneezing, they carry many more. Every time you touch a surface and then touch your nose or your eyes, you give a virus a chance to enter. In winter, those chances come more often.
The type of virus matters too. Some cold viruses are more common in winter than in summer, and they seem to spread best in the cold months. Scientists are still learning exactly why, but the pattern is clear: the winter season is the peak season for colds in most parts of the world where there is a real winter. In places with no cold season, colds still happen, but they do not show the same sharp winter peak. That tells us that winter conditions, not just the calendar, are doing the work.
It is worth remembering that a cold virus does not need a long time to spread. A sneeze can send droplets several metres. A cough in a closed room can fill the air in seconds. A handshake can pass a virus from one person to another in a moment. In winter, all of those routes are a little more effective, and there are more ill people using them. That is the first, and perhaps the most important, reason why winter is cold season.
More Time Indoors, Closer Together
The second big reason is simpler, and it is about how we live in winter. When it is cold outside, we stay inside. We close the windows, we turn on the heating, and we spend hours in rooms with other people, breathing the same air. In summer, we open windows, we sit outside, we spend time in gardens and parks, and the air around us is constantly moving and changing. In winter, we are indoors, close together, in air that is shared again and again.
Think about a classroom in winter. Thirty children sit in one room for hours, with the windows shut against the cold. One child has a cold and sneezes. The droplets stay in the still air, and the other children breathe them in. Think about an office, a bus, a train, or a family home in the evening. Everyone is inside, in the same warm rooms, for hours at a time. A virus that would have been blown away outdoors in summer has nowhere to go indoors in winter. It stays in the room, and it finds new people to infect.
Crowding makes this worse. Winter brings people together for festivals, for family gatherings, for school terms, and for work that cannot be done outdoors. We shake more hands, we hug more relatives, we sit closer together at meals, and we share more indoor spaces. Each of those contacts is a chance for a virus to pass from one person to another. None of them is wrong, and none of them should be avoided entirely, but together they explain why a cold can sweep through a whole household in a few days in January, while in July the same cold might affect only one person.
Ventilation is part of the answer, and it is a practical one. Opening a window for a short time, even in winter, lets fresh air in and stale air out, and that reduces the number of virus droplets in the room. It does not need to be for long, and it does not need to make the room cold. A few minutes of fresh air, a few times a day, can make a real difference. It is one of the simplest winter habits, and it works because it changes the air that everyone in the room is breathing.
Dry Air and Your Nose
Your nose is your first line of defence against a cold virus, and winter makes that defence weaker. Inside your nose is a lining covered in mucus, a thin, sticky fluid, and tiny hairs that move in waves. Together, they trap dust, germs, and virus droplets, and they move them away before they can settle and cause an infection. It is a quiet, constant cleaning system, and it works best when the lining is warm and moist.
Winter air is dry, both outside and inside. Outside, cold air holds very little moisture. Inside, heating dries the air even further. When you breathe in dry air for hours, the lining of your nose dries out. The mucus becomes thicker and moves more slowly. The tiny hairs move less well. Cracks can appear in the dry lining, and those cracks give a virus an easier way in. It is like a wall with dry, cracked mortar: it still stands, but it is easier to get through than a wall that is smooth and wet.
Breathing through your mouth makes this worse. When you breathe through your nose, the air is warmed and moistened on its way in. When you breathe through your mouth, cold, dry air goes straight to your throat, drying it out as well. That is why a sore throat often follows a night of sleeping with your mouth open in a dry, heated room. The throat is dry, the lining is irritated, and a virus that arrives in the morning finds a throat that is already struggling.
There are simple ways to help your nose cope with dry winter air. Drinking enough water keeps the mucus thin and moving. Keeping the air in your home from getting too dry, for example by not overheating rooms, or by placing a bowl of water near a heater, can help. Breathing through your nose when you can, rather than your mouth, gives the air a chance to warm up before it reaches your throat. None of these will stop a virus on their own, but they keep your first line of defence in better shape, and that gives your body a better chance of fighting off a virus before it takes hold.
Short Days, Less Sunlight, Tired Bodies
Winter is not just cold. It is also dark. The days are short, the nights are long, and many people spend most of the daylight hours indoors, at work or at school. That lack of daylight affects the body in ways that are easy to overlook, and they add up to a body that is less ready to fight off a cold.
One of those ways is vitamin D. Your body makes vitamin D when sunlight touches your skin, and vitamin D helps your immune system, the system that fights infections, work properly. In summer, with long days and time outdoors, most people make enough. In winter, with short days and most of the skin covered by warm clothes, many people make much less. That does not mean everyone in winter is low in vitamin D, and it does not mean a supplement will stop colds, but it does mean that one part of the immune system may be working with less support in winter than in summer.
Sleep is another part of the story. In winter, people often sleep less well, or they sleep at irregular times, because of long dark evenings, busy schedules, and the pressure of the season. Poor sleep weakens the immune system. Studies have shown that people who sleep less are more likely to catch a cold when they are exposed to a virus, and their colds tend to last longer. It is not that sleep alone causes a cold. It is that a tired body fights less well, and a virus that might have been beaten off in summer gets a better chance in winter.
Stress plays a part too. Winter can be a stressful time, with work deadlines, school exams, family gatherings, and the cost of heating and holidays. Stress, especially stress that goes on for weeks, can weaken the immune system as well. It is not the kind of stress that comes from one bad day. It is the slow, steady stress of a busy winter that leaves the body with less energy to fight infections. When you add short days, poor sleep, and steady stress together, you get a body that is more open to a cold virus, even before you count the extra viruses in the air and the extra time spent indoors.
School, Work, and the Winter Calendar
Winter is also the season when schools and workplaces are at their busiest, and that matters for colds. Children are the great spreaders of colds, not because they are careless, but because they spend hours in crowded classrooms, they share toys and pencils, they touch everything, and they are still learning to wash their hands and cover their coughs. A child who catches a cold at school brings it home, and within a few days the whole family has it. Then the family takes it to work, to the shops, and to other families. That is how a cold moves through a whole town in winter.
The school calendar makes this pattern stronger. In many places, the winter term is the longest term, with few breaks, and children are together every day for weeks. There is no gap for the chain of infection to break. In summer, when schools close and children spend more time outdoors, the chain breaks, and colds become less common. The same is true of offices and workplaces. In winter, everyone is at work, in the same building, day after day, sharing the same air, the same kitchen, and the same door handles. A cold that starts with one person can reach the whole office in a week.
Travel adds to the pattern. Winter is a time of travel for holidays and family visits, and travel means crowded buses, trains, and planes, where people from different places mix together and share air for hours. A virus that was common in one town can travel to another town in a day, carried by a traveller who does not yet know they are ill. That is why colds often seem to arrive in waves after a holiday, when everyone returns to school and work at the same time.
None of this means that school or work should stop in winter. It means that the winter calendar, with its long terms, its crowded rooms, and its travel, is part of why colds peak in winter. Understanding that helps explain why a cold can sweep through a whole class or a whole office so quickly, and why it often starts with a child, or with one person who has just returned from a trip.
Why Some People Seem to Catch Every Cold
Almost everyone knows someone who seems to catch every cold that goes around, and someone else who almost never gets ill, even when everyone around them is sneezing. That difference is real, and it has several causes. One is exposure. A person who works with children, or who travels on crowded buses every day, or who lives in a large household, is exposed to more viruses than a person who works alone and lives alone. More exposure means more chances to catch a cold, and that alone can explain a lot of the difference.
Another cause is the immune system itself. Your immune system remembers the viruses it has met before, and it fights them more quickly the next time. But there are many different cold viruses, and new ones appear all the time, so even a strong immune system cannot remember them all. Some people have immune systems that respond more quickly, and some respond more slowly, for reasons that are partly about age, partly about general health, and partly about things we do not fully understand. Young children catch more colds than adults, because their immune systems are still learning. Older people may catch fewer colds, but their colds can last longer. Adults in the middle often catch fewer colds than children, because they have met many of the common viruses before.
General health matters too. A person who is well rested, who eats a varied diet, who gets regular movement, and who does not smoke, is likely to fight off a cold virus more effectively than a person who is exhausted, who eats poorly, and who smokes. Smoking is particularly important, because it damages the lining of the nose and the airways, making it easier for a virus to settle and harder for the body to clear it. That is one reason smokers tend to catch more colds, and their colds tend to last longer.
It is also worth saying that catching a cold does not mean your immune system has failed. A cold is a sign that your immune system is working: it has noticed the virus and it is fighting it, and the sneezing, the runny nose, and the sore throat are part of that fight. A person who catches a cold is not weak. They have simply met a virus their body had not met before, or a virus that arrived in a large enough amount to take hold. That is a normal part of life, in winter more than in summer, and it happens to almost everyone.
What Winter Habits Actually Help
If winter makes colds more likely, what can you actually do about it? The honest answer is that you cannot stop all colds, and anyone who promises that is not telling the truth. But you can lower your chances, and you can make the colds you do catch shorter and milder, by paying attention to a few simple habits that work with the causes described above.
The first habit is about hands. Cold viruses travel on hands more than people realise. You touch a door handle, a bus rail, a shared phone, and then you touch your nose or your eyes, and the virus enters. Washing your hands often, with soap and water, especially after being in crowded places, after travelling, and before eating, is one of the most effective ways to break that chain. It does not need to be a long, careful ritual. A proper wash with soap, covering all parts of the hands, is enough. If soap and water are not available, a hand sanitiser can help, but soap and water are the first choice.
The second habit is about air. Let fresh air into the rooms where you spend time, even in winter. Open a window for a few minutes, a few times a day, to let stale air out and fresh air in. If you are in a crowded room and you can move nearer to a window, or step outside for a few minutes, that helps too. Fresh air does not kill viruses, but it dilutes them, and fewer viruses in the air means fewer chances of breathing in enough to cause a cold.
The third habit is about rest and food. Sleep is not a luxury in winter. It is part of how your body fights infections. A regular sleep time, and enough hours of sleep, give your immune system the time it needs to do its work. Food matters too, not in the sense of a special diet, but in the sense of a varied diet with enough fruit, vegetables, and protein, and enough water. A body that is well fed and well rested is a body that can fight a virus more effectively than a body that is tired and hungry.
The fourth habit is about not spreading a cold when you have one. If you have a cold, covering your coughs and sneezes, washing your hands often, and staying home from work or school when you are at your worst, helps protect the people around you. It is not always possible to stay home, but even a day or two at the height of a cold can break the chain and stop the virus reaching a whole office or classroom. That is a kindness to others, and it is also a practical way to slow the spread of colds in winter.
There are also things that do not help as much as people hope. Taking large amounts of vitamin C, or a special supplement, will not stop a cold, and it will not cure one quickly. Staying warm, on its own, will not stop a virus. Wearing a scarf will keep your neck warm, but it will not stop a virus from travelling from a coughing person to you in a crowded room. The habits that help are the simple, boring ones: clean hands, fresh air, enough sleep, good food, and staying home when you are ill. They are not exciting, but they are the ones that work, and they work because they match the real causes of winter colds.
My Take:
If you ask me what I think about why we catch colds more often in winter, my answer is that it is a good example of how a simple question can have a complicated answer, and how the simple answer is often wrong. For years, I thought what most people thought: cold weather gives you a cold. It seemed obvious. Winter comes, the weather gets cold, and people start sneezing. What else could it be? But when you look closer, the story is not about the cold at all. It is about viruses, and about how winter helps those viruses travel, survive, and find their way into our noses. That is a more interesting answer, and it is a more useful one, because it tells you what you can actually do about it.
I think the most important part of this story is the part about being indoors. We spend winter inside, in warm rooms, with the windows shut, breathing the same air as everyone else for hours at a time. In summer, we are outside, the air is moving, and a virus has a hard time finding us. In winter, we are trapped together in still air, and a virus has all the time in the world. That is such a simple idea, and yet it explains so much. It explains why a cold sweeps through a classroom, why a whole office gets ill in the same week, and why a family can pass a cold from one person to another in a few days. It is not the cold weather. It is the closed room.
I also think the dry air part of the story is worth remembering, because it is the part most people never hear about. Your nose is a clever defence system, with mucus and tiny hairs that trap germs and move them away. But that system needs moisture to work, and winter air, both outside and inside, is dry. Heating dries it even more. So your nose dries out, the mucus thickens, the tiny hairs slow down, and a virus that would have been trapped and removed in summer gets through in winter. That is not a dramatic failure. It is a small, quiet weakening of a defence, and it happens to everyone, every winter. I find that humbling, because it reminds me that our bodies are not separate from the weather. They are part of it, and they respond to it in ways we do not notice until we get ill.
There is another part of this story that I think about a lot, and it is about sleep and tiredness. Winter is a tiring season. The days are short, the nights are long, work is busy, school is busy, and many people sleep less well than they do in summer. A tired body fights less well. That is not a new idea, but it is one we forget in winter, when we are busy and stressed and telling ourselves to push through. I think the honest advice here is to take sleep seriously in winter, not as a luxury, but as part of staying well. A regular bedtime, enough hours of sleep, and a little less rushing around can make a real difference, not just to how you feel, but to how well your body can fight off a cold when it meets one.
I want to be honest about what I do not think, too. I do not think that staying warm will stop you catching a cold, and I do not think that a thick coat is a shield against a virus. A coat keeps you warm, and that is a good thing, but it does not stop a virus from travelling from a coughing person to you in a crowded bus. I also do not think that vitamin C, or any supplement, will stop a cold, or cure one in a day. I have heard those claims many times, and they sound appealing, because they promise an easy answer. But the real answer is less exciting and more honest: clean hands, fresh air, enough sleep, good food, and staying home when you are ill. Those are the habits that work, and they work because they match the real causes. I prefer an honest, boring answer to an exciting, false one, because the honest answer is the one you can actually use.
I think about children a lot when I think about winter colds, because children are at the centre of the story. They spend hours in crowded classrooms, they share everything, they touch everything, and they bring colds home to their families. That is not their fault. It is simply how childhood works. A child who catches a cold at school is not doing anything wrong, and a parent whose child brings a cold home is not doing anything wrong either. It is the pattern of winter, and it happens to almost every family. I think it helps to know that, because it takes away the blame. You did not catch a cold because you were careless, or because you forgot your coat. You caught it because you live in a world full of viruses, and in winter those viruses have an easier time reaching you. That is not a failure. It is a normal part of life.
If a friend asked me how to avoid colds in winter, I would not give them a long list of rules. I would tell them three things. Wash your hands often, especially after crowded places and before eating. Let fresh air into your rooms, even for a few minutes a day. And sleep properly, because a tired body is an open door for a cold. I would also tell them to stay home when they are at their worst, not just for themselves, but for the people around them. Those are small things, and they will not stop every cold, but they will lower the chances, and they will make the colds that do come shorter and milder. That is a realistic promise, and I think a realistic promise is worth more than a grand one that cannot be kept.
I also think it is worth saying that catching a cold is not a sign of weakness. A cold is a sign that your body is fighting. The sneezing, the runny nose, the sore throat: those are your body pushing a virus out, and that is a good thing, even though it feels miserable. I think we should be kinder to ourselves when we catch a cold, and kinder to others when they catch one. It is not a failure to be ill in winter. It is a normal, human experience, and it happens to almost everyone, every year. The question is not how to never catch a cold. The question is how to catch fewer of them, and how to recover well when you do.
There is a final thought I want to leave with, and it is about the difference between a cause and a season. Cold weather does not cause a cold, but winter is the season of colds, and that distinction matters. It matters because it tells you where to look for help. You do not need a warmer coat. You need cleaner hands, fresher air, better sleep, and a little patience with your body. That is a useful thing to know, and it is a hopeful thing, too, because those are things you can actually do. Winter will come every year, and colds will come with it, but understanding why they come gives you a better chance of getting through the season with fewer of them, and with less worry when they do arrive.
I want to add one more thing, because I think it is easy to miss in all the talk about viruses and dry air. Winter colds are also a reminder that we live close together, and that our health is connected. A cold that starts with one child in a classroom can reach a whole town in a week, not because anyone did anything wrong, but because we share air, we share rooms, and we share our lives. That connection is a good thing, most of the time. It is what makes winter warm, with family gatherings, and shared meals, and time together indoors. The price of that closeness is that we share our colds as well. I think that is a fair price, and I think the answer is not to hide away from each other, but to take the simple steps that make sharing a room safer: clean hands, fresh air, and staying home when you are ill. That way we can keep the warmth of winter, and catch fewer of its colds.
The pattern of winter colds is familiar in almost every household, and it repeats in the same way each year. As soon as the weather turns cold, someone starts sneezing, and within a week the tissues are being passed around the table. Older relatives often say it is the cold weather, and they advise an extra layer and a warm drink. The warm drink is comforting, and the extra layer keeps you warm, but neither one addresses the real cause. The cold is not in the air. It is in the room, travelling from one person to another in the air everyone shares. Knowing that changes what helps. Opening a window, washing hands more often, and staying home when ill do more than another jumper ever could.
I think about schools a lot in this context, because schools are where winter colds begin for so many families. Teachers know this pattern well. In January, a teacher expects that a good share of the class will be ill at some point, and plans for it: tissues on the desks, windows opened between lessons, and regular reminders for the children to wash their hands. Those are small things, but they make a difference, and they are the kind of practical habits that actually work. They do not stop every cold, but they slow the spread, and they mean that fewer children are ill at the same time. That is a realistic goal, and it is worth aiming for.
There is also a part of winter that has nothing to do with viruses, and it is about how winter feels. The days are short, the evenings are long, and many people feel low and tired. That tiredness is real, and it affects the body as well as the mood. I think we should be honest about that, because it means that looking after yourself in winter is not just about avoiding germs. It is also about getting enough light, getting outside when the sun is out, even for a short walk, and keeping a regular routine. A walk in the winter sun, even for ten minutes, can lift your mood and give your body a little of the daylight it is missing. It will not stop a cold on its own, but it is part of staying well, and it is a habit worth keeping.
I want to say something about the advice people give in winter, because so much of it is well meant but unhelpful. People will tell you to take this vitamin, or drink that tea, or wear that scarf, as if one small thing will keep you well all winter. I understand why they say it. They want to help, and they want a simple answer. But the truth is that there is no single thing that stops colds, and pretending there is only makes people feel guilty when they catch one anyway. The real answer is a handful of small habits, done regularly, and even then you will still catch a cold sometimes. That is not a failure. It is winter, and it is life.
Finally, I think it is worth remembering that winter does end. The colds peak, and then the days get longer, the air gets warmer, the windows open again, and the colds fade. That cycle repeats every year, and knowing it helps. It means that a bad winter, with one cold after another, is not a permanent state. It is a season, and seasons pass. In the meantime, the best thing you can do is to take the simple steps that help, to be kind to yourself when you are ill, and to be kind to others when they are ill, too. That is not a grand plan, but it is an honest one, and it is enough to get through the winter with fewer colds, and with less worry about the ones you do catch.
One last thing I want to say is about the first cold of winter, which always feels worse than the ones that follow. It arrives when you are not expecting it, it catches you by surprise, and it makes you feel as if the whole winter will be like this. It will not be. The first cold is often the worst because your body has not yet settled into winter, and because you have forgotten how a cold feels after a summer without one. The colds that follow are usually milder, and you learn to live with them. That is a small comfort, but in the middle of a winter cold, a small comfort is worth having.
Frequently Asked Questions
Does we catch a cold more often in winter happen to many people?
Yes, it happens to almost everyone. Winter is the peak season for colds in most places with a real winter, and most people catch at least one cold each winter, often more. Children catch more colds than adults, and people who work with children or travel on crowded transport catch more than people who work alone. It is one of the most common illnesses in the world.
When should I speak with a healthcare professional about we catch a cold more often in winter?
Most colds get better on their own within a week or two. Speak with a health professional if a cold does not improve, if it gets much worse, if you have a high fever that does not settle, if you have trouble breathing, if you have chest pain, or if you have a health condition that makes colds riskier for you. If you are worried, it is always sensible to ask.
Why does we catch a cold more often in winter happen to me?
It happens because winter brings together several things at once: more cold viruses in the air, more time spent indoors in crowded rooms, dry air that weakens your nose’s defences, short days and less sunlight, and often less sleep and more stress. If you spend a lot of time with children, travel on crowded transport, or work in a busy office, you are exposed to more viruses, and that makes it more likely you will catch a cold.
Can we catch a cold more often in winter be linked to sleep or tiredness?
Yes. Poor sleep and tiredness weaken the immune system, which is the system that fights infections. People who sleep less are more likely to catch a cold when they are exposed to a virus, and their colds tend to last longer. In winter, short days, busy schedules, and stress often mean less sleep, and that makes the body less able to fight off a virus.
What can I do in general when we catch a cold more often in winter happens?
In general, wash your hands often with soap and water, let fresh air into rooms even in winter, get enough sleep, eat a varied diet, and drink enough water. When you have a cold, rest, drink fluids, cover your coughs and sneezes, and stay home from work or school when you are at your worst, so you do not pass it to others. If a cold worries you or does not get better, speak with a health professional.
Is we catch a cold more often in winter something I should worry about?
For most healthy people, a winter cold is not something to worry about. It is common, it is usually mild, and it gets better on its own within a week or two. Worry is sensible if a cold does not improve, if it gets much worse, if breathing becomes difficult, or if you have a health condition that makes infections riskier. For most people, though, a winter cold is an ordinary, if unpleasant, part of the season.
