Alopecia areata (al-uh-PEE-shuh air-ee-AH-tuh) is a condition that causes hair loss on the scalp and sometimes somewhere else on the body. Alopecia areata is usually a type of hair loss that takes place when your immune system incorrectly …

Alopecia areata: This disease causes hair loss and often occurs in otherwise healthy people. This condition can affect people and children, and hair thinning can begin suddenly and without warning. Hair coming from the scalp typically come…