What is it?

Hair loss, or alopecia, may affect the scalp but also other body parts and could be permanent or temporary. Alopecia causes may include hormonal changes, hereditary causes, medical conditions, medications, stress, radiation therapy or normal aging process. Baldness usually refers to excessive scalp hair loss. Hair loss may appear as a gradual thinning on top of the head, as circular or patchy bald spots, as sudden loosening of the hair, and more.