Causes of a nosebleed
The inside of the nose is delicate and nosebleeds happen when it's damaged. This can be caused by:
- picking your nose
- blowing your nose too hard
- the inside of your nose being too dry (because of a change in air temperature)
Nosebleeds that need medical attention can come from deeper inside the nose and usually affect adults. They can be caused by:
- an injury or broken nose
- high blood pressure
- conditions that affect the blood vessels or how the blood clots
- certain medicines, like warfarin
Sometimes the cause of a nosebleed is unknown.
Certain people are more prone to getting nosebleeds, including:
- children (they usually grow out of them by 11)
- elderly people
- pregnant women