Alopecia areata

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 stress. People are generally otherwise healthy. In a few cases, all the hair on the scalp is lost (alopecia totalis) or all body hair is lost (alopecia universalis) and loss can be permanent.