what causes noses to bleed
1 The definition of a nosebleed is simply bleeding from the blood vessels in the nose. 2  The medical term for nosebleed is epistaxis. 3  Nosebleeds are common due to the location of the nose on the face, and the large amount of blood vessels in the nose.s a result, trauma to the face can cause nasal injury and 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 the winter months when the air is dry and warm from household heaters.