Nosebleed

Definition

A nosebleed, also called epistaxis, is a loss of blood from any blood vessel in the nose. It usually appears in only one nostril.

Description

Although unexpected or persistent bleeding from anywhere is a warning sign of cancer and should be investigated, nosebleeds are rarely a sign of serious illness. They are usually the result of minor injury or irritation.

Nosebleeds most often come from the front of the septum, the cartilage that separates the nose into two nostrils. These anterior nosebleeds comprise 80 percent of all nosebleeds. A mass of blood vessels, called Kiesselbach's plexus, lie on either side of the septum. These blood vessels are easy to injure and bleeding can occur.

Posterior nosebleeds, which come from the back of the nose, are less common and much harder to manage. Bleeding usually begins in the upper part of the nose and flows toward the throat and mouth where it is swallowed. It is difficult to determine how much blood is lost in these nosebleeds.

Demographics

Though it is a common misconception that children are more susceptible to nosebleeds than adults, research has found that nosebleeds are more prevalent in older adults and more often are a sign of other health problems. Nosebleeds do, however, occur frequently in childhood. About 30 percent of children up to five years of age have had spontaneous nosebleeds that appeared without apparent injury to the nose. Of children six to ten years of age, 56 percent have had them and 64 percent of preadolescents and adolescents from 11 to 15 have as well. Moreover, over half of adults with recurring nosebleeds had them as children. Only about 10 percent of children with frequent nosebleeds have been found to have a previously undiagnosed bleeding disorder.

Rarely, menstruating women, even adolescents, who have endometriosis, a condition in which tissues resembling the lining of the uterus occur abnormally in other parts of the pelvic cavity and sometimes in other parts of the body, can have cyclical nosebleeds with their menstrual periods.

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