Why Do Nosebleeds Happen in Dry Weather

A nosebleed is a frightening thing the first time it happens, even though it is usually not dangerous. One moment everything is normal, and the next moment blood is dripping from your nose onto your shirt, and you are not sure what you did wrong. In dry weather, nosebleeds become more common, and many people notice the pattern clearly: the air turns dry, the inside of the nose feels sore and crusty, and then a nosebleed arrives, sometimes in the morning, sometimes in the middle of the night. This article explains in plain words why dry air causes nosebleeds, what is happening inside the nose, and what simple care generally helps. This is general information only, not advice for any one person. If nosebleeds keep happening, or if the bleeding is heavy, a qualified health professional is the right person to ask.

What a Nosebleed Really Is

A nosebleed is bleeding from the blood vessels inside the nose, and to understand why it happens, it helps to picture what the inside of the nose looks like. The nose is not just an empty tunnel. Its walls are covered with a thin, soft lining called the nasal lining, and just under that lining there is a rich network of tiny blood vessels. These vessels are there for a good reason. They warm the air you breathe in, and they add moisture to it, so that the air reaching your lungs is warm and damp, not cold and dry. The nose does this job every minute of every day, without you noticing, and it does it well as long as the lining stays moist and healthy.

Most nosebleeds start at the very front of the nose, in the soft part you can press between your thumb and finger. This area is called the front of the dividing wall between the two nostrils, and it has a dense cluster of small blood vessels very close to the surface. Because these vessels sit so close to the surface, and because the lining over them is so thin, they are easy to damage. A small scratch, a hard blow of the nose, or a crack in the dry lining is often enough to break one of them. When a vessel breaks, blood comes out of the nostril, sometimes in drops and sometimes in a steady flow. It looks alarming, because blood always looks alarming, but in most cases the vessel is tiny, and the bleeding stops on its own within a few minutes once the blood forms a clot.

There are also nosebleeds that start deeper inside the nose, further back, and these are less common and more serious. They usually happen in older people, and the bleeding can be heavier, because the vessels further back are larger. But the nosebleeds that most people experience, and almost all the nosebleeds that happen in dry weather, start at the front of the nose, from those small surface vessels. Knowing where the bleeding comes from is useful, because it explains why simple pressure on the soft part of the nose helps. When you press the soft part, you are pressing directly on the broken vessel, and that pressure gives the blood time to form a clot and seal the break. That is the whole logic of first aid for a nosebleed, and it is why pressing the right place matters more than anything else.

Why Dry Air Dries the Inside of Your Nose

The inside of your nose is meant to stay moist. The lining makes a thin layer of mucus, which is a clear, slippery fluid that keeps the surface damp, traps dust and germs from the air, and protects the tiny blood vessels underneath. When the air you breathe is moist, this system works easily. The lining stays soft, the mucus flows normally, and the vessels are cushioned. But when the air becomes dry, the moisture is pulled out of the lining faster than the body can replace it. Think of a wet cloth left out in dry wind. It does not stay wet for long. It dries, stiffens, and then cracks. The lining of the nose behaves in a similar way. It dries out, it becomes stiff and sore, and small cracks appear in its surface.

Once the lining has dried and cracked, the small blood vessels underneath lose their protection. In a healthy, moist nose, the lining is like a soft blanket over the vessels. In a dry nose, that blanket has thinned and torn, and the vessels sit almost bare. That is why a nosebleed in dry weather often seems to happen for no reason at all. You did not bump your nose, you did not pick it, you were simply sitting at home, and blood started to drip. What happened was that the dry lining cracked a little further, perhaps when you breathed in a gust of dry air, or when you blew your nose gently, and the crack reached a small vessel. The vessel was already close to the surface, and it had no soft lining left to protect it, so it broke.

Dry air can come from many places, and not all of them are outdoors. Cold winter air holds very little moisture, so winter is the season when nosebleeds are most common in many countries. But indoor air can be just as dry, and sometimes drier. Heaters, whether they burn gas or use electricity, warm the air inside a room and dry it out at the same time. Air conditioning can do the same in summer, cooling the air but pulling moisture out of it. A room that feels warm and comfortable can still have very dry air, and if you sleep in that room all night, breathing dry air for seven or eight hours, the lining of your nose has a long time to dry out. That is why so many nosebleeds happen in the morning, or wake people up in the middle of the night. The nose has been drying all night long.

Winter, Heaters and Cold Dry Days

Winter is the hardest season for the inside of the nose, and the reason is a simple fact about air: cold air cannot hold much moisture. When the temperature drops, the air becomes dry, and when you breathe that dry air in, it pulls moisture from your nose with every breath. In places with real winters, people notice this clearly. Their lips crack, their skin feels tight, and the inside of their nose feels sore and crusty. These are all signs of the same thing: the air is taking moisture from the body faster than the body can replace it. The nose, with its thin lining and its surface vessels, is one of the first places to show the damage, and a nosebleed is often the first clear sign.

Heaters make the problem worse, because they dry the indoor air even further. When cold air from outside is brought inside and heated, it becomes even drier, because warm air can hold more moisture, and if no extra moisture is added, the air stays dry. This is why a house can feel warm and still give you a nosebleed. You are sitting in a warm room, breathing warm dry air, and your nose is drying out hour by hour. People who work in heated offices, or who sleep in a bedroom with a heater running all night, often get nosebleeds in winter even though they rarely go outside. The heater is doing the drying, not the weather outside the window. It is also why nosebleeds can happen in dry summer heat, in places where the air is hot and dry for months, and where air conditioning runs all day and all night.

There are simple ways to put moisture back into the air, and they are worth knowing, because they help the nose as well as the skin and the throat. A humidifier is a small machine that adds moisture to the air in a room, and running one in the bedroom at night can make a real difference for people who get nosebleeds in dry weather. If you do not have a humidifier, a bowl of water placed near a heater, or a damp towel hung in the room, can add a little moisture to the air, though not as much. Even a short steam from a hot shower, with the bathroom door closed, can moisten the nose for a while. These are not cures, and they will not stop every nosebleed, but they address the cause directly. The nose bleeds because it is dry, so anything that keeps the air and the nose more moist helps.

The Thin Lining and the Small Blood Vessels

The lining inside the nose is thinner than most people realise, and that thinness is both its strength and its weakness. It is thin because it needs to be close to the blood vessels, so that the vessels can warm the air and add moisture to it. If the lining were thick, the vessels could not do their job properly. But because it is thin, it has very little protection of its own. A small crack goes through it easily, and once it cracks, the vessel underneath is exposed. This is why the front of the nose is so vulnerable. The cluster of vessels there sits under the thinnest part of the lining, and the front of the nose is also the part that meets the dry air first, with every breath you take.

The vessels themselves are small, but there are many of them, and they are close together. This is useful for warming air, but it means that a single crack in the lining can reach a vessel without much difficulty. It also means that once one vessel has broken and healed, another nearby vessel can break a few days later, which is why nosebleeds in dry weather often come in a run. You have one nosebleed on Monday, another on Wednesday, and another on Friday, and it feels as if your nose will never heal. What is actually happening is that the lining is still dry, and each new crack finds a new vessel. The bleeding is not a sign that your nose is getting worse. It is a sign that the lining has not yet had time to heal, and that the air is still dry enough to keep cracking it.

Healing takes time, and it takes moisture. The lining repairs itself by making new cells, and those cells need a damp surface to grow properly. If the air stays dry, the new lining dries out before it has properly healed, and it cracks again. This is why a single nosebleed can turn into a week of nosebleeds, and why the real fix is not just stopping the bleeding, but giving the lining a chance to heal. Keeping the nose moist, breathing moist air, and avoiding anything that scratches the lining all help the healing process. The body is good at repairing itself, but it needs the right conditions, and in dry weather, those conditions are exactly what is missing.

Blowing, Picking and Other Small Irritations

Dry weather sets the scene for a nosebleed, but a small irritation is often what finally starts it. The most common of these is blowing the nose too hard. When the lining is dry and cracked, a hard blow can tear the crack wider and break the vessel underneath. This is especially common when a person has a cold, because a cold makes the nose run, and the person blows their nose many times a day. Each blow is a small strain on a lining that is already dry and sore, and sooner or later one of those blows breaks a vessel. Blowing gently, one nostril at a time, and using a soft tissue instead of a rough one, puts far less strain on the lining, and it is one of the simplest habits that can reduce nosebleeds in dry weather.

Nose picking is another common trigger, and it is one that people are often embarrassed to talk about, but it is worth naming plainly, because it is one of the main causes of nosebleeds in children. When the nose is dry, crusts form inside it, and those crusts feel uncomfortable. A child, and many adults too, will pick at a crust to remove it, and the fingernail scratches the dry lining underneath. The scratch breaks a small vessel, and the nosebleeds. It is a simple chain of events, and it is easy to understand once you know it. The fix is not to scold the child, but to deal with the crusts. Keeping the nose moist makes fewer crusts form, and trimming fingernails short reduces the damage when a child does pick. A little patience and a little moisture solve more of this problem than any amount of telling a child not to pick.

Other small irritations can play the same role. Breathing in dust, smoke, or strong chemical smells can irritate the lining and make it more likely to crack. Rubbing the nose hard, or bumping it in play or in sport, can break a vessel that was already close to the surface. Even breathing through the mouth at night, which many people do when their nose is blocked, can dry the nose further, because the air that should be moistened by the nose is going in through the mouth instead, and the nose dries out while it is not being used. None of these irritations is dangerous on its own. But when the lining is already dry, any one of them can be the final small push that starts a nosebleed.

Why Children Get Nosebleeds in Dry Weather

Children get nosebleeds more often than adults, and dry weather makes the difference even bigger. There are several reasons for this, and none of them is a cause for alarm on its own. First, a child’s nose is smaller, and the lining and the vessels are closer to the surface, so a small crack reaches a vessel more easily. Second, children pick their noses more than adults do, partly because they are less self-conscious about it, and partly because dry crusts bother them more and they want to get rid of them. Third, children often play hard, run around, and bump into things, and a small bump that an adult would barely notice can break a fragile vessel in a dry child’s nose.

Children also spend more time in dry heated rooms in winter, sitting in classrooms and bedrooms where heaters run all day, and they often breathe through their mouths when they have a cold, which dries the nose further. Add to that the fact that children blow their noses harder than they need to, because nobody has taught them to blow gently, and you have a clear picture of why a child can have three nosebleeds in one week while the adults in the same house have none. The child is not ill, and the nose is not weak. The child is simply living in the same dry air, with a smaller nose, more picking, harder blowing, and more bumps.

Parents often worry when a child has repeated nosebleeds, and that worry is natural, because blood is frightening, especially when it comes from your own child. The useful thing to know is that most childhood nosebleeds in dry weather are from the front of the nose, they stop within a few minutes with simple pressure, and they become less frequent as the child grows older and the nose grows larger and stronger. What helps most is keeping the nose moist, teaching the child to blow gently, keeping fingernails short, and staying calm when a nosebleed happens, because a calm parent helps the child stay calm, and a calm child is easier to help. If nosebleeds happen very often, or if the bleeding is heavy or hard to stop, a health professional should see the child, but an ordinary run of winter nosebleeds is a normal part of childhood in dry weather.

Simple Care That Generally Helps

When a nosebleed starts, the first thing to do is stay calm and sit down. Panic makes the heart beat faster, and a faster heartbeat can make bleeding heavier, so calm is not just a comfort, it is genuinely useful. Sit upright, lean slightly forward, and pinch the soft part of the nose, below the hard bridge, with your thumb and finger. Hold the pinch firmly and steadily for ten to fifteen minutes, without letting go to check whether the bleeding has stopped. Letting go too early breaks the clot that is forming and starts the bleeding again. Breathing through the mouth while you pinch is normal and fine. This simple pressure is the most important thing you can do, and it stops most front nosebleeds on its own.

Leaning forward matters, and it is worth understanding why. Many people tilt their head back when their nose bleeds, because they think it will stop the blood from coming out. In fact, tilting the head back lets blood run down the throat, where it can cause coughing, sickness, and a choking feeling. Leaning slightly forward lets the blood come out of the nose, where you can see it, and where the pressure you are applying can work on the broken vessel. It is a small detail, but it is one of the most common mistakes, and it makes a real difference to how comfortable and safe the nosebleed feels. A tissue or a clean cloth under the nose catches the blood, and spitting out any blood that reaches the mouth is better than swallowing it.

After the bleeding has stopped, the nose needs gentle care for a few hours. Do not blow your nose hard, do not pick at the clot inside, and try not to bend over or lift anything heavy, because all of these can restart the bleeding. A little moisture helps the lining recover. Breathing in steam from a hot shower, or holding a warm damp cloth over the nose for a few minutes, can soothe the lining. Some people use a small amount of a plain moisturising ointment just inside the front of the nose, which keeps the lining damp and helps it heal, though this is a general habit, not a treatment, and anyone unsure should ask a health professional first. The main point is simple: the nose has just healed a small break, and it needs a few quiet hours, and a little moisture, to make that healing last.

When a Nosebleed Needs More Attention

Most nosebleeds in dry weather need no more than simple pressure and a little patience. But there are signs that mean a nosebleed deserves more attention, and it is worth knowing them clearly. The first sign is time. If the bleeding does not stop after twenty minutes of steady pressure, or if it stops and then starts again heavily, that is a reason to seek help. The second sign is amount. If the blood is flowing heavily, or if you are swallowing a lot of blood, or if you feel dizzy, weak, or faint, do not wait. These are signs that the bleeding is more than a small surface vessel, and it needs a professional to look at it.

The third sign is frequency. One or two nosebleeds in a dry winter week are common. Nosebleeds that happen almost every day for weeks, or that happen in both nostrils again and again, or that happen even when the weather is not dry, are worth mentioning to a health professional. The fourth sign is the setting. If a nosebleed starts after a hard blow to the head or the face, or if it starts while you are taking medicine that affects the blood, or if you have a health condition that affects bleeding, mention it to the professional who looks after you. They have the full picture, and they can judge whether the nosebleed is an ordinary dry-weather event or a clue to something that needs attention.

It is also worth saying that children and older people deserve a little extra care here. A child who has a nosebleed that will not stop, or who looks pale and tired after a nosebleed, should be seen by a health professional. An older person who gets frequent nosebleeds, especially from deep inside the nose, should also be seen, because the vessels further back are larger and the bleeding can be heavier. In both cases, the aim is not to cause worry, but to be sure. Most of the time, the answer will be reassuring, and the professional will explain simple ways to keep the nose moist and to handle the next nosebleed calmly. That reassurance, and that practical advice, is worth having, and asking for it is never a waste of time.

My Take:

If you ask me what I think about nosebleeds in dry weather, my first thought is that they are one of those problems that look far worse than they are, and that the fear they cause is often worse than the bleeding itself. Blood is frightening. It stains your clothes, it drips onto the floor, and it makes you feel as if something inside you has gone badly wrong. But a nosebleed from the front of the nose, in dry weather, is usually a tiny break in a tiny vessel under a thin, dried-out lining. It is not a sign that your body is failing. It is a sign that the air is dry and the lining of your nose has cracked. I think knowing that simple fact takes away half the fear, and taking away the fear matters, because fear makes the heart beat faster, and a faster heartbeat can make the bleeding heavier.

I have also noticed that most people do the wrong thing first, and it is the same wrong thing every time: they tilt their head back. I understand why. It feels natural to tip your head back to stop something coming out of your nose, just as you tip a bottle back to stop it spilling. But the nose is not a bottle, and tilting back lets the blood run down your throat, where it makes you cough and feel sick. The right thing, sitting up and leaning slightly forward while pinching the soft part of the nose, feels wrong at first, because the blood keeps coming out where you can see it. But that is exactly the point. The blood should come out of the nose, not down the throat, and the pressure you are applying can only work if it is pressing on the broken vessel. I think this is one of those small pieces of knowledge that every family should have, because a nosebleed is one of the most common emergencies in a home, and most families will face one sooner or later.

The part of this topic that matters most to me is the dryness, because dryness is the cause, and it is the cause that people overlook. When a nosebleed happens, people ask what they did wrong. Did they blow too hard? Did they pick their nose? Did they bump into something? Sometimes one of those things did start the bleeding. But the real reason the bleeding started so easily is that the lining was already dry and cracked, and it was dry because the air was dry. That is why the same hard blow that causes nothing in summer can cause a nosebleed in winter. The blow did not change. The lining did. I think the lesson here is to fix the dryness, not just to blame the blow. Keeping the air in the bedroom a little more moist, keeping the nose a little more moist, and giving the lining time to heal will do more to stop the next nosebleed than any amount of being careful not to bump your nose.

I want to say something about winter, because winter is when this problem is at its worst, and winter is also when people are least likely to connect the nosebleed with the air. In winter, you are inside, you are warm, and you feel comfortable. The idea that the air in your warm room is drying out your nose feels strange, because the room does not feel dry. It feels cosy. But a heated room in winter is often the driest place you will spend your day, and you spend seven or eight hours a night breathing that air while you sleep. That is why so many nosebleeds happen in the morning, or wake people up at night. The nose has been drying for hours, and the first blow of the nose in the morning, or the first dry breath, is enough to break a vessel. A humidifier in the bedroom is a simple answer, and I think it is one of the best small purchases a family can make if nosebleeds are a regular winter problem. A bowl of water near a heater helps a little too, though not as much.

Children are the part of this that I think about most, because children get nosebleeds often, and parents worry about them deeply. A child with blood on their face is a frightening sight for any parent, and the child’s own fear makes it worse, because the child cries, and crying makes the bleeding heavier. I think the best thing a parent can do is to stay calm, because a calm parent makes a calm child. Sit the child down, lean them slightly forward, pinch the soft part of the nose, and talk to them quietly while you wait. Tell them it will stop, tell them it is not dangerous, and give them a tissue to hold. Do not shout, do not rush, and do not tilt their head back. Most childhood nosebleeds stop within a few minutes with simple pressure, and the child will forget about it long before the parent does. If nosebleeds happen very often, or the bleeding is heavy, ask a health professional. But an ordinary run of winter nosebleeds is a normal part of growing up in dry weather.

There is another thing I think is worth saying, and it is about patience after the bleeding stops. Most people, once the nosebleed has stopped, go straight back to normal life. They blow their nose hard to clear it, they pick at the clot, they bend down to pick something up, and the bleeding starts again. Then they think the nosebleed was worse than it was, when in fact they simply disturbed the clot before it had properly set. A clot is a delicate thing. It is the body’s way of sealing a tiny break, and it needs a few quiet hours to hold. I think we should treat the hours after a nosebleed gently: no hard blowing, no picking, no heavy lifting, no bending over for a while. It is a small amount of patience, and it makes a real difference. The nose has healed a small break, and it deserves a little time to make that healing last.

I also think it is important to know the line between an ordinary nosebleed and one that needs help, and to respect it without fear. An ordinary nosebleed starts at the front of the nose, it stops within twenty minutes of steady pressure, and it happens in dry weather or after a small irritation. A nosebleed that needs help is one that will not stop after twenty minutes, one that flows heavily, one that makes you feel dizzy or faint, or one that happens almost every day for weeks. I think most people can sense this line themselves. They know when a nosebleed feels different from the ones they have had before. My advice is to trust that feeling and ask a health professional. The answer will probably be reassuring, and the professional can show you how to keep the nose moist and how to handle the next nosebleed. Asking is never a waste of time, and it is far better than sitting at home worrying.

My final view is simple. Nosebleeds in dry weather happen because dry air dries the thin lining inside the nose, the lining cracks, and a small vessel close to the surface breaks. The best response is calm and simple: sit up, lean slightly forward, pinch the soft part of the nose firmly for ten to fifteen minutes, and do not let go to check. The best prevention is moisture: moister air in the bedroom, a moist nose, gentle blowing, short fingernails, and time for the lining to heal. And the best judgment is knowing when to ask for help: bleeding that will not stop, heavy bleeding, dizziness, or nosebleeds that keep coming back day after day. That is the whole of it, in plain words. A nosebleed looks frightening, but most of the time it is a small break in a small vessel, and the body, given a little pressure and a little moisture, heals it by itself.

I also want to mention the embarrassment of a nosebleed in public, because it is real and it catches people off guard. A nosebleed at work, at school, or on a bus leaves blood on your clothes and on your hands, and everyone around you stares. The natural reaction is to panic and to try to hide it, but panic makes the heart beat faster and the bleeding heavier. The better reaction is to stay calm, sit down, lean forward, and pinch your nose, and to let the people around you help if they offer a tissue. Most people have seen a nosebleed before, and most of them will help rather than judge. Keeping a small pack of tissues in your pocket or bag during dry weather is a simple habit that costs almost nothing, and it means you are never caught without something clean to press against your nose.

There is also the question of what to do at work or at school when nosebleeds keep happening. If you work in a heated office all day, or if your child sits in a heated classroom all day, the dry air is there for eight hours at a time, and the nose has no break from it. It is worth asking whether a humidifier can be used in the room, or whether a window can be opened for a short time to let in fresh air, or whether the heating can be turned down a little. These are small requests, and they help everyone in the room, not just the person with nosebleeds, because dry air also dries the skin, the throat, and the eyes. Drinking water regularly through the day helps too, because the body needs water to keep all of its linings moist, including the lining of the nose. A person who drinks very little water all day is more likely to have a dry nose by the evening.

One last thing I would say is about travel and change of place. People often get their first nosebleed in a new place: a cold city in winter, a hot dry town in summer, or a long flight in a dry aeroplane cabin. The air in an aeroplane is famously dry, and a long flight can dry the nose badly, which is why nosebleeds on planes are not uncommon. If you are travelling to a dry place, it helps to know this in advance. Drink water during the journey, breathe gently, and keep a few tissues handy. It is a small preparation, but it means a nosebleed in a strange place does not turn into a fright. The nose is the same wherever you go. It needs moisture, and when the air takes that moisture away, it will tell you, in the only way it can, with a little blood. Listen to it, keep it moist, and it will usually heal on its own.

One more habit I would add is a small daily routine for the nose in dry weather, because a little care every day is worth more than a big effort once a nosebleed has started. In the morning, after a hot shower, the nose is moist from the steam, and that is a good moment to leave it alone and let it stay moist. During the day, drink water regularly, blow gently when you need to, and resist the urge to pick at crusts. In the evening, before bed, breathing in steam from a bowl of hot water for a few minutes, or simply spending a few minutes in a steamy bathroom, can moisten the nose before the long dry night. None of this is complicated, and none of it costs money. It is just a small routine, repeated every day, that keeps the lining soft and gives it a chance to heal. A nose that is looked after a little every day bleeds far less than a nose that is only noticed when it starts to bleed.

Frequently Asked Questions

Why does nosebleeds happen in dry weather happen in everyday life?

Nosebleeds happen more often in dry weather because dry air pulls moisture out of the thin lining inside the nose. The lining dries, stiffens, and cracks, and the small blood vessels just underneath it lose their protection. A gentle blow, a small scratch, or even a breath of dry air can then break one of those vessels. This is why nosebleeds are most common in winter, when cold air holds little moisture and heaters dry the indoor air even further.

Is nosebleeds happen in dry weather something most people experience?

Yes, nosebleeds in dry weather are very common, and most people have had at least one. Children get them more often than adults, because their noses are smaller and the vessels sit closer to the surface, and because they pick their noses and blow harder. Older people also get them more often, because the lining becomes thinner with age. One or two nosebleeds in a dry winter week are ordinary and usually nothing to worry about.

How long does nosebleeds happen in dry weather usually take to settle into a routine?

A single nosebleed usually stops within a few minutes with steady pressure on the soft part of the nose. The lining itself needs longer to heal, often several days, and during that time the nose can bleed again if the air stays dry or the lining is scratched. There is no fixed number of days, and no routine to settle into. The useful approach is to keep the nose moist, avoid hard blowing and picking, and give the lining time to heal. If nosebleeds happen almost every day for weeks, ask a health professional.

What simple daily habits help with nosebleeds happen in dry weather?

The habits that help most are the ones that keep the nose moist. Running a humidifier in the bedroom at night, or placing a bowl of water near a heater, adds moisture to dry indoor air. Blowing the nose gently, one nostril at a time, puts less strain on the lining, and keeping fingernails short reduces damage from picking. Breathing in steam from a hot shower can soothe a dry nose, and drinking enough water through the day helps the body keep its linings moist. These are small habits, but they address the dryness that causes the problem.

Can nosebleeds happen in dry weather change with the seasons?

Yes, very clearly. Nosebleeds are most common in winter, when cold air is dry and heaters dry the indoor air further, and in hot dry summers, where the air holds little moisture and air conditioning dries it more. In humid seasons, when the air is moist, the lining of the nose stays soft and nosebleeds become much less common. The seasons do not change the nose itself, but they change the air, and the air is what dries the lining and starts the bleeding.

When should I ask a health professional about nosebleeds happen in dry weather?

Ask a health professional if the bleeding does not stop after twenty minutes of steady pressure, if it stops and then starts again heavily, or if the blood flows heavily and you feel dizzy, weak, or faint. Also ask if nosebleeds happen almost every day for weeks, if they happen even when the weather is not dry, if they start after a blow to the head or face, or if you take medicine that affects the blood. This article is general information only and cannot judge an individual situation.