Alopecia Areata is an autoimmune disorder that affects roughly 6.8 million people in the United States (US). This disorder usually results in unpredictable hair loss. Hair usually falls out in small patches at a time but some cases can be more extreme.
This autoimmune disorder can lead to complete loss of hair on the scalp, which has been termed alopecia totalis. In extreme cases, when the entire body suffers hair loss it is called alopecia universalis. This condition can affect anyone no matter the age or gender, but studies have shown that most cases occur before the age of 30.