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Alopecia areata primarily affects hair, but in some cases, there are nail changes as well. People with the disease are usually healthy and have no other symptoms.

Hair Changes

Alopecia areata typically begins with sudden loss of round or oval patches of hair on the scalp, but any body part may be affected, such as the beard area in men, or the eyebrows or eyelashes. Around the edges of the patch, there are often short broken hairs or exclamation point hairs that are narrower at their base than their tip. There is usually no sign of a rash, redness, or scarring on the bare patches. Some people say they feel tingling, burning, or itching on patches of skin right before the hair falls out.

When a bare patch develops, it is hard to predict what will happen next. The possibilities include:

In most cases, the hair regrows, but there may be subsequent episodes of hair loss.

The hair tends to regrow on its own more fully in people with:

Nail Changes

Nail changes such as pits (tiny dents) occur in some people, especially those who have more extensive hair loss.

See original here:
Alopecia Areata - Hair loss Causes & Living With It | NIAMS

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