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Alopecia areata, also known as spot baldness, is a condition in which hair is lost from some or all areas of the body. Often it results in a few bald spots on the scalp, each about the size of a coin. The disease may cause psychological disorder. People are generally otherwise healthy. In a few cases, all the hair on the scalp or all body hair is lost and loss can be permanent.Alopecia areata is believed to be an autoimmune disease resulting from a breach in the immune privilege of the hair follicles. ...