Alopecia areata is a condition in which individuals experience round patches of hair loss. Its exact cause is unknown, although research suggests it is hereditary, as roughly 20% of people with alopecia have a family history of the condition. The main symptom of alopecia areata is round patches of hair loss on head or body.
To diagnose alopecia areata, bloods tests and/or a scalp biopsy are performed, as this condition is sometimes associated with autoimmune disorders. Treatment for alopecia areata may include steroid injections, UV light therapy, or topical corticosteroids. There is no direct treatment available for alopecia areata; however, many people successfully regrow their hair with the assistance of the aforementioned treatment methods.