<unk>  Typical first symptoms of<unk>  are small bald patches. The underlying skin is unscarred and looks superficially normal. Although these patches can take many shapes, they are usually round or oval.<unk>  most often affects the scalp and beard, but may occur on any part of the body with hair. Different areas of the skin may exhibit hair loss and regrowth at the same time. The disease may also go into remission for a time, or may be permanent. It is common in children. The area of hair loss may tingle or be mildly painful. The hair tends to fall out over a short period of time, with the loss commonly occurring more on one side of the scalp than the other. Exclamation point hairs, narrower along the length of the strand closer to the base, producing a characteristic "exclamation point" appearance, are often present. These hairs are very short (3–4 mm), and can be seen surrounding the bald patches. When healthy hair is pulled out, at most a few should come out, and ripped hair should not be distributed evenly across the tugged portion of the scalp. In cases of<unk> , hair tends to pull out more easily along the edge of the patch where the follicles are already being attacked by the body's immune system than away from the patch where they are still healthy. Nails may have pitting or trachyonychia.
Alopecia areata
Hair loss
Alopecia mucinosa
Trichotillomania
Alopecia universalis
Alopecia totalis
Loose anagen syndrome
Alopecia neoplastica