Alopécie

In Dermatology, the alopécie indicates the acceleration of the fall of the Cheveu X and/or from the Poil S. the term comes from the Greek alopex (Renard) because of the annual fall of the hairs of this animal.

One distinguishes five types of alopécies:

the hereditary androgenetic alopécie is most frequent: it appears by a reduction in the volume of the hair, even a Calvitie, and touches 70% of the men;
the acute alopécie: it can be related to a treatment by Chimiothérapie, a Stress, important food deficiencies, a deficiency in Fer, hormonal disorders, a acute irradiation;
the localized alopécie: it can be caused by problems of skin (Tumeur, Brûlure, Pelade), a Radiothérapie or parasites (Teigne, Lichen).
the congenital alopécie.
the alopécie Areata which seems to be of auto-immune origin (cellular mechanism of mediation) which is characterized by an attack in " patch" more or less large and at one or more places. This shape of skinwool can reach all the head and one speaks about alopécie Totalis and sometimes the whole of the body it is the alopécie Universalis and in this case there is no more no hair nor hair on the unit of the body

Differences between losses of hair normal and abnormal

Given that a person has on average 100.000 hair, it is normal that she loses approximately 50 to 100 hair per day, with points being able to climb up to 175 during the changes of season. Indeed, it is during this phase that the hair is renewed more. A fall of hair is regarded as abnormal when a person loses more than 100 hair per day for enough a long period which can go up to two months. The diagnosis of this fall requires a consultation and sometimes an examination called trichogramme (one takes some hair in various zones of the scalp and one observes them under the microscope). Sometimes, a hormonal assessment is necessary at the woman. The result of these examinations directs towards one of the following problems.

The androgenetic alopécie or baldness at the man

The androgenetic alopécie is a gradual loss of the hair due to the influence of the male hormones. It generally appears between 40 and 50 years, at 70% of the men on average, but, in certain cases, it can appear as of 18 years. The hormone which causes this loss of hair would be the DHT. This loss of hair generally starts on the level of the gulfs (the front of the head) and of the vertex (back of the head). It is characterized by a refinement of the hair and a fall which can be abrupt at certain individuals and slower for others.

The androgenetic alopécie or baldness at the woman

See also: the alopécie or baldness at the woman

Treatment of androgenetic baldness

Nutritional causes

Apart from the hormonal causes, the fall of the hair can be caused by deficiencies out of iron, copper, zinc, silicon, vitamins B. This kind of loss of hair would reach approximately 20% of the people practitioner a mode moderated with severe. However, it is more often associated with problems of bulimia or anorexia. Generally, the person will find her hair at the end of one period of time which can go up to 2 years.

Skinwool

The skinwool of the areata type, universalis or totalis is a disease involving the loss of the hair and/or the hairs. The cause of this disease remains unknown today but the scientists are very in favor of an auto-immune mechanism which leads to an attack of the hair by a category of white globules.

There exist mainly the 3 shapes of skinwool: Alopécie Areata: located attack, by " patch" Alopécie Totalis, attack located with the head. Alopécie Universalis, attack generalized with the whole of the body.

See too

Tinea ~ Lichen
Radiotherapy ~ Chemotherapy
Hyperandrogénie
Cicatricial alopecia of Brocq
Clerc's Office of hair

External bonds

Chute-de-cheveux.info general Information on the alopécie and its treatments.
e-cancer.fr Information on the alopécie related to a chemotherapy.

Simple: Alopecia

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