Their medical name is epistaxis. Nosebleeds occur because the inside of the nose is full of tiny blood vessels that can start bleeding if they are disturbed. This usually happens as the result of a minor injury and can be caused by picking, or blowing, the nose
Nosebleeds can also occur if the moist lining inside the nose dries out and becomes crusty. This can be the result of an infection, cold weather, or the drying effect of central heating
Nosebleeds are not usually serious but in very rare cases they can be life threatening, particularly in older people whose blood may take longer to clot, resulting in high blood loss
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