Monday, June 29, 2009

Facts behind Hair Loss in Men

The normal cycle of hair growth lasts for 2 to 6 years. Each hair grows approximately 1 centimeter (less than half an inch) per month during this phase. About 90 percent of the hair on your scalp is growing at any one time. About 10 percent of the hair on your scalp, at any one time, is in a resting phase. After 2 to 3 months, the resting hair falls out and new hair starts to grow in its place. It is normal to shed some hair each day as part of this cycle. However, some people may experience excessive (more than normal) hair loss. Hair loss of this type can affect men, women and children.


A number of things can cause excessive hair loss. For example, about 3 or 4 months after an illness or a major surgery, you may suddenly lose a large amount of hair. This hair loss is related to the stress of the illness and is temporary. Hormonal problems may cause hair loss. If your thyroid gland is overactive or underactive, your hair may fall out. Certain infections can cause hair loss. Fungal infections of the scalp can cause hair loss in children. Finally, hair loss may occur as part of an underlying disease, such as lupus or diabetes.

The common baldness
The term "common baldness" usually means male pattern baldness, or permanent pattern baldness. Male pattern baldness is the most common cause of hair loss in men. Men who have this type of hair loss usually have inherited the trait. Men who start losing their hair at an early age tend to develop more extensive baldness. In male pattern baldness, hair loss typically results in a receding hair line and baldness on the top of the head.

Male Pattern Baldness
The male pattern baldness form of androgenetic alopecia accounts for more than 95% of hair loss in men. By age 35, two thirds of UK and EU men will have some degree of appreciable hair loss and by age 50 approximately 85% of men have significantly thinning hair. About 25% of men who suffer from male pattern baldness begin the painful process before they reach 21.

Most men who suffer from male pattern baldness are extremely unhappy with their situation and would do anything to change it. Hair loss affects every aspect of their life. It affects interpersonal relationships as well as their professional life. It is not uncommon for men to change their career paths because of hair loss.

The Causes of Male Pattern Baldness
Most men are genetically predisposed to male pattern baldness. It is the effect of hormones on the hair follicle that produces male pattern baldness. Testosterone, a hormone that is present in high levels in males after puberty, is converted to dihydrotestosterone (DHT) by an enzyme called 5 alpha reductase. DHT has an adverse affect on the hair follicles. Acting on a hormone receptor on the hair follicle it slows down hair production and produces weak, shorter hair, sometimes it stops hair growth from the follicle completely. This process gradually depletes your stock of hair and is normal hair loss.

1 comments:

lina said...

Well, it's about hormones... Thanks I'm a woman...