The nose is a part of the body rich in blood vessels (vascular) and placed in a vulnerable position as it stands in the face. As a result, trauma to the face and nasal injuries can cause bleeding. The bleeding may be profuse, or simply a minor complication. Nosebleeds can occur spontaneously when the nasal membranes dry out and crack. This is common in dry climates or during winter months when the air is dry and warm from household heaters. People are more susceptible to nosebleeds if you are taking medications that prevent normal blood clotting warfarin (Coumadin), aspirin or anti-inflammatory drug]. In this situation, even minor trauma can result in significant bleeding.
The incidence of nosebleeds is higher during the colder winter months when respiratory infections are more frequent, and the temperature and humidity fluctuate dramatically. In addition, changes in external environment of bitter cold a warm, dry results, the house is heated in the drying and changes in the nose making it more susceptible to bleeding. Nosebleeds are also produced in hot, dry climates with low humidity, or when a change in seasons. The following factors predispose people to nosebleeds: