Hair loss, also known as alopecia or baldness, refers to the loss of hair from the scalp or the entire body. It occurs due to disruption in the hair growth cycle. It can be hereditary or may occur secondary to medical illness, hormonal changes or drugs. It may affect men, women and children. A normal individual sheds 50 to 100 hairs per day, but it is not noticeable as new hair growth occurs simultaneously.