Anagen is the growth phase of a hair follicle. Anagen will last for 2 -3 years.Around 85% of the hairs are currently on the Anagen growth phase. Anagen will be followed by catagen. Catagen is a stage known as transitional stage and lasts for 2 weeks. This is followed by telogen or resting stage. Normally there are 100 000 hairs on the scalp and about 100 may be shed daily.