Hair Loss During Hair Growth Phases
There are many types of hair loss . It is often categorized according to when it takes place during the hair growth cycle: anagen, catagen, and telogen.
- The anagen phase is when your hair grows—your hair follicle forms a new hair shaft. Most (90%) of the hair on your scalp is in a growing phase that lasts from 2 to 6 years.
- The catagen phase follows the anagen stage. This is a 1- to 2-week transition stage between anagen and telogen. Less than 1% of your scalp hair is in this phase.
- The telogen stage is the rest stage. At the end of this 3- to 4-month phase, some of your hair falls out. Losing up to 100 hairs a day is normal. When a hair falls out, a new hair is grown in the same hair follicle, and the growing cycle begins again.