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Nosebleeds (cont.)

Nosebleeds Causes

Most nosebleeds do not have an easily identifiable cause. However, trauma to the nose is a common cause of nosebleeds. Trauma to the outside of the nose from a blow to the face, or trauma to the inside of the nose from nose picking both often initiate a nosebleed. Local irritation inside the nose from a nasal or sinus infection can also cause nosebleeds.

Less commonly, an underlying disease process or taking certain medications may cause a nosebleed or make it more difficult to control.

Inability of the blood to clot is most often due to blood-thinning medications such as warfarin (Coumadin) or aspirin.
Liver disease can also interfere with blood clotting.
Abnormal blood vessels in the nose and nasal cancers are rare causes of nosebleeds.
High blood pressure may contribute to bleeding but is almost never the only reason for a nosebleed.