Although Male Pattern Baldness (MPB) among adult males is most noticeable and widespread, people of all ages and both sexes may experience hair loss problems due to any of a variety of causes.
Alopecia Areata, a condition in which hair comes out by the roots in one or more spots, is much less common than Male Pattern Baldness. It generally strikes first during childhood or early adulthood. Sometimes called patchy baldness, Alopecia Areata may clear up on its own or progress to the point where the person loses all scalp hair (Alopecia Totalis), or even body hair, including eyelashes and eyebrows (Alopecia Universalis).
Although the exact cause is not known, some experts believe Alopecia Areata may involve an immunological disorder, which causes the body to produce antibodies that attack the hair follicles. Other evidence suggests that Alopecia Areata may be in some cases, a hereditary condition.
Hair loss may also be caused by:
You should always consult your doctor if you are concerned about excessive hair loss or uncertain about the cause of your hair loss.