Hair loss issues?
Androgenetic alopecia is a common disorder leading to hair loss; it is genetic or hereditary in origin. Hair falls out because the hair follicles or roots are too sensitive to Dihydrotestosterone DHT, a by-product of testosterone, the male hormone circulating in the blood. The hair on the crown of the head is protected from the effects of these hormones.
Up to two-thirds of Caucasian men between the ages of 35 and 40 are affected; women are affected to a lesser degree (around 30 % before menopause and more than 50% after the menopause).
In men, the first sign of baldness is a gradually receding hairline followed by more or less extensive loss of hair around a bald patch on the vertex. In women, hair loss appears as a gradual and diffuse reduction in hair density all over the scalp; the hairline is usually not particularly affected.
Hair loss is usually gradual, with periods of active loss alternating with periods of remission.
Generally speaking, if hair loss begins early in life, it will be more severe in later years.