Each strand of hair is enclosed in the cavity of the skin called a hair-follicle. These hair follicles replace older hair with newer one at different pace during the hair growth cycle. Hair grows approximately about an inch every couple of months, remains constant at that length for a brief period of time and then falls (withers) off after a period of about three to four months. About 90% of hair is in the growing phase at any given time. Although it is normal to lose some strands of hair each day as a part of the normal hair growth cycle, some people experience excessive loss of hair which may become a cause of concern. Anyone can be affected by hair loss during their life time, which may occur due to a variety of reasons.In men who suffer from male-pattern baldness, the hair growth cycle treads a different route.
