Nosebleeds: Why they start and how to stop them The medical term for a nosebleed is epistaxis. Because of the position of the nose - right in the middle of the face - and its high density of blood vessels, most of us will have had at least one nosebleed at some time during our lives. Although seldom a cause for alarm, nosebleeds can be life-threatening in rare cases. Nosebleeds are most often caused by local trauma but can also be caused by foreign bodies, nasal or sinus infections, and prolonged inhalation of dry air. Tumors and vascular malformations are also potential causes of nosebleeds, but they are rare. Spontaneous nosebleeds are fairly common, especially in children. When the mucous membrane (a mucus-secreting tissue inside the nose) dries, crusts, or cracks and is then disturbed by nose-picking, it is likely to bleed. Because the nose is full of blood vessels, any minor injury to the face can cause the nose to bleed profusely. Nosebleeds...
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