Alopecia, or hair loss, is a common condition that affects men and women of all ages. It can occur as a result of aging, heredity, medications or an underlying medical condition. It ranges in severity from total baldness, to patches of bald spots or thinning hair, and may be confined to the scalp or affect other areas of the body. Treating alopecia can involve discontinuing certain medications, treating infections, or use of mediations that help promote hair growth.