Hair loss, as the name itself implies, refers to the falling of hair from scalp / head; another term used to describe this is alopecia. It is a broad term that also includes thinning of hair.
While genetics plays a vital role in this condition that afflicts both men and women, there are several other factors that are involved in bringing on this problem in people. In order to understand the reasons for hair fall better, it is essential that you learn about the various growth stages of hair.
After completion of last stage, the entire cycle is repeated. Each single hair undergoes these three phases of growth independent of the other hair on the scalp. Normally, at a given point of time about 90% of hair is in the anagen phase and only 10% is in the telogen phase. When this ratio is altered, it leads to increased rate of hair loss. Hair loss can occur at any age, and can be prevalent in both males and females. Hair loss in itself is not a disease, but a sign that often indicates various other diseases. Hair loss occurs as a result of various diseases or factors and in different patterns.