The normal cycle of hair growth continues for about 2 to 6 years. Each hair grows about 1 centimeter each month during this growing phase phase. About 90 percent of the hair on a persons scalp is growing at any one time while the rest 10 percent of the hair on the scalp remains in the resting phase. After a period of 2 to 3 months, these resting hair fall out due to natural hair loss and new hair starts to grow in its place. Natural hair fall is one of the major causes for hair loss.
Stress can also be one of the major causes for hair loss. Sudden hair loss caused by to stress is known as Telogen Effluvium. Telogen Effluvium takes place when sudden or severe stress causes an increase in the shedding of hair. This acute and sudden hair loss due to stresscan be noticed 2 or 3 months after a stressful like a surgery or an accident or bereavement has occurred.
The normal rate of hair loss 100 hairs per day but the rate of stress related hair loss is much higher. Stress is one of the major causes for hair loss. Chemotherapy or therapy with potent drugs to treat cancer can often cause severe hair loss which is otherwise known as Alopecia. This chemotherapy hair loss takes place because the cells in the hair follicles grow fast and chemotherapy hampers fast growing cells. Hair loss due to Chemotherapy is temporary in nature and your hair will grow back once treatment is complete but still it is one of the main reasons for hair loss in men and women.
There is heightened level of progesterone and estrogen during pregnancy and when these levels drop suddenly after delivery this causes their hair to slip into the resting or telegen stage which in turn causes severe hair loss. Hair loss after pregnancy is another common reason of hair loss in women. Most women undergo severe hair loss after they've had a baby. So there may be an quite a few major causes for hair loss in men and women.
