Alopecia areata is a type of autoimmune disorder that affects the hair follicles, resulting in hair loss in small, round patches. There are several synonyms for alopecia areata, including spot baldness, patchy hair loss, and pelade. Other terms for this condition include circumscribed alopecia, ophiasis, and marginal alopecia. In some cases, alopecia areata may also be referred to as traumatic alopecia, which is caused by physical damage to the hair follicles. Regardless of the terminology used, alopecia areata can be a distressing condition for those who experience it, and appropriate treatment may be necessary to manage symptoms and promote regrowth of hair.