what can cause nose bleeds
Abnormal blood clotting: Anything that interferes with blood clotting can lead to nosebleeds. Medications, even common ones like aspirin, can alter the blood-clotting mechanism just enough to cause bleeding. Blood diseases, such as hemophilia, also can provoke nosebleeds.
Causes of nosebleeds. There are many causes of nosebleeds, most of which arenât serious. Beginning with the most common, they include: Colds and allergies: A cold or allergy causes swelling and irritation inside the nose and may lead to spontaneous bleeding.