Alopecia areata

alopecia areata

What is it?

Alopecia areata causes rapid hair loss in the form of circular patches. They are usually the size of a coin and they expand until they reach almost the entire head. Although it is more common on the scalp, it can also appear in other areas, such as the beard (in men). Unlike other types of alopecia, the area affected by hair loss looks healthy without flaking, inflammation, or redness.

This alopecia occurs because the body's own defense system attacks the roots of the hair, causing inflammation, causing the hair to fall out and not grow back until the inflammation stops. The cause of this inflammation is completely unknown. There is evidence that genetics can have an impact and stress can be a trigger.

The development of this disease varies from person to person. The consequences are very obvious and difficult to hide. In some people, the hair grows back completely, while in others it does not.


Alopecia areata is classified into two types:

  • Total Alopecia Areata: affects the entire scalp, causing the affected person to lose all their hair. This condition triggers total baldness.
  • Universal Alopecia Areata: occurs when the disorder spreads over the rest of the body hair, including the hair of the armpits, the pubis and the eyebrows and eyelashes.

Who is affected?

It affects men and women of all ages equally. But the incidence among younger ages is higher. Also, this class is more common to occur among children.

Studies indicate that some people with this condition have a family history of surgery. In addition, it is believed that major events such as illness, pregnancy, accident or trauma can lead to its onset.


This type of alopecia is one of the most unpredictable and variable, since its development and evolution cannot be accurately determined. Sometimes hair can grow back in one area and then disappear again, and new patches can also appear in other areas, spread to other areas and cause total baldness.

For this reason, it is essential to have the diagnosis and treatment of a qualified professional team.

Among the most recommended treatments are:

  1. Anti-inflammatory drugs to act directly on the basis of the problem. This group includes corticosteroid lotions and local injections with triamcinolone microinjections.
  1. There is also treatment with topical immunotherapy with diphencyprone.