Hair growth is no longer a mystery.
In people with normal hair growth, hair that has entered the telogen phase remains dormant in the scalp for two to four months. This hair is then shed when a new hair growing from the same bulb pushes it out. In men and women who are losing more hair than they are growing, the telogen or resting phase can last several years - or the remainder of your life. Often a hair is growing, but you do not see it easily. These fine, barely pigmented, nearly invisible hairs are called vellus hair.