Alopecia areata: A classification of hair loss
This is a condition that causes round patches of hair loss and can lead to total baldness. The cause of alopecia areata is unknown. Approximately one fifth of people with this condition have a family history of alopecia.
It is thought that alopecia areata is a disease that affects scalp. This occurs when the body's immune system mistakenly attacks and destroys healthy body tissue.
Alopecia areata was seen in men, women and children. Transcendent a fact of life, such as illness, pregnancy or trauma occurs before hair loss in some patients but not in most of them.
The forms of alopecia include:
- Alopecia areata, patches of hair loss, usually in the scalp, but may also be in the beard or other areas.
- Alopecia totalis: complete loss of scalp hair.
- Alopecia universalis: complete loss of all body hair.
Most often no symptoms other than hair loss are visible, but some people may feel a burning sensation or itching.
Alopecia areata usually starts as one or two patches of hair loss, most commonly on the scalp. Also it can appear in the beard, eyebrows, arms or legs.
Round patches of hair loss are smooth and can be the color of peach. Sometimes, there are hairs that look like exclamation points on the edges of a bald patch.
- Loss of all scalp hair (alopecia totalis), often within 6 months of onset of symptoms.
- Loss of all scalp and body hair (alopecia universalis).
