A bald is condition associated with hair loss. It occurs mostly when natural and gradual process of hair loss and subsequent replacement is tampered with by certain factors. These factors inhibits the growth of hair in some parts of the head hence poor replacement mechanism. Balds are however associated mostly with men even though there are some cases of hair loss among women that also results into baldness. Causes of balds among men can be hormonal, genetic, old age, or side effects of overuse of particular drugs.
Hair development has two phases. The growth phase that mostly last for about six years and a dormant phase that lasts for around four months. A hormone in men called hydro-testosterone inhibits the growth of hair especially on the scalp, the summit and the front section of the head. The hormone prolongs the dormant phase and shortens the growth phase. When this happens the young hair follicles inhibited from developing into mature, pigmented and deeply rooted terminal hair. This eventually leads to less hair growth in the parts of the head that are prone to the action of the testosterone hormone by product – hydro-testosterone. The parts that are adversely exposed to this hormone are the summit of the head, the scalp, and the front parts of the head. A long term inhibition of hair growth eventually leads to baldness.
There is sufficient reason to believe that baldness is genetic. A receptor gene by the name androgen which is associated with the type X chromosome is believed to be a scientific explanation for the male pattern baldness. The X chromosomes are genetically transferred to off springs from their female parents. It is however true to say that both the Y and X chromosomes carry with them traits of baldness onto the off springs. Thus both the male and the female parents have a genetic role to play in the equation of male baldness.
Baldness in males is also associated with age, though the age at which a man begins to show signs of it differ from person to person. The male pattern baldness however begins to show in 25% of men in their thirties and by around sixty years over 60% of men show full baldness. Few adverse cases have signs of male pattern baldness at puberty.
Overuse of certain drugs and medications can also lead to massive hair loss among men. The use of steroids is a typical example. Medications for treatment of diabetes, hypertension, and chemotherapy have massive effects on hair growth and development. The side effects of drugs used in such medications may result into severe hormonal imbalances that result in massive hair loss among men.