Hair is made up of a shaft and a root. The shaft is the hair you see on your skin. At the lower end of the root is a swelling called the hair bulb and this is surrounded by a socket called a hair follicle. The hair grows upwards from the root and emerges from the skin. Each follicle has a growth phase where the hair falls out. In this way, hair are continually grown, shed and replaced throughout and individual’s life, at any one time, different hairs will be at a different stage of this growth cycle.