Diseases

Alopecia: the causes

The causes of alopecia are multiple:

The causes of alopecia in men

Male androgenetic alopecia is linked to genetic and hormonal factors. Androgenetic = andro (anogen: male hormone) + genetics. In question: male hormones, androgens, which play a major role in male hair loss, it is also why it does not declare after puberty.

Testosterone, which is a male hormone, is an indirect factor in baldness. It is because of the enzyme 5 alpha reductase that it will turn into dihydrotestosterone (DHT) and cause hair loss.

The DHT will exhaust, by accelerating its cycles, the hair, which will be apparently finer and clear, until the follicle disappears. Some treatments work by trying to avoid this transformation of testosterone into DHT in order to avoid this capillary loss.

The genetic factor is important, but not obligatory. If on the side of the father or the mother, several members of the family suffer from baldness, there is more probability that the man in himself himself victim. However, the phenomenon may skip one or more generations.

Special case: There are cases where stress can have an influence on hair loss. However, it will only affect the intensity and / or the starting period of this loss.

Because of its frequency, androgenetic alopecia can associate with other types of hair loss in humans - a diffuse hair loss related to taking a drug (anticoagulants, anticholesterol, isotretinoin, antidepressant), a diffuse alopecia areata or an inflammatory cicatricial alopecia - hence the interest of the control by a medical specialist who will make the necessary examinations if necessary.

Causes of alopecia in women

Hormonal and genetic factors are often implicated in female androgenetic alopecia, but may be involved in other problems.

A woman may suffer from polycystic ovary syndrome (acne, hypertrichosis, ovarian cysts) which often results in abnormal cycles or simply abnormal sensitivity to the male hormones she produces. Because yes, in the normal state, women secrete a little male hormones!

Women are often victims of abundant and occasional falls related to a telogen effluvium. In particular, a few months after delivery, there is a significant drop that is called in this case, the effluvium of the postpartum.

Some medications (anticoagulants, isotretinoin, anti-cholesterol, anti-depressants) can cause hair loss.

Contraception : contraceptive pills are sometimes the cause of hair loss (1st generation pills containing levonorgestrel). In addition, stopping estrogen / progestin contraception often causes hair loss in the following months.

Can also cause a significant hair loss several different deficiencies:

  • iron deficiency caused by heavy periods,
  • protein or vitamin deficiencies caused, for example, by an overly strict diet

Some hair loss may be due to hairstyles (hair straighteners, braids, updos) or hair straighteners (straighteners). These practices can cause hair pulling and traction alopecia (stretched buns, braids, additions, extensions) or hair breakage (straightening, smoothing).

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Read also :

> Hair loss in women
> Hormone disruption: from symptoms to treatments
> Iron deficiency anemia due to iron deficiency
> The life cycle of the hair

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