Hair loss in Men
The most common type of hair loss in men is known as the Androgenetic Alopecia. The psychosocial element is often associated with hair loss which includes decreased self-esteem, dissatisfaction with appearance, self-consciousness, and often emotional stress.
Causes of hair loss in men:
Genetic: Hair loss is multifactorial. The genetic basis is more complex than what was originally thought. It can be inherited from either of the parent in contrast to earlier notion that it is often from the maternal side. The factor/gene on X chromosome namely androgen receptor gene is mainly responsible.
On average, an individual hair grows for two to six years, eventually each strand of hair goes through a resting stage for several months and then falls out, and is replaced by new hair strands. With male hair pattern baldness, the follicle becomes smaller. It grows shorter and eventually stops growing hair altogether
Hormone: Male pattern baldness is generally due to the action of dihydrotestosterone (DHT) on scalp hair follicles. DHT causes shortening of the growth phase causing shortening of the hair follicle producing short and fine hair which is eventually totally lost.
DHT is formed by the action of 5a reductase on testosterone. 5a reductase occurs in two forms, type I and type II. Type II is predominantly found in hair follicle, some medications act on this enzyme thereby increasing the growth of hair.
Classic androgenic hair loss in males begins above the temples and vertex, of the scalp. As it progresses, a rim of hair at the sides and rear of the head remains, as follicles in these area are resistant to the effect of DHT.
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