Hair loss, also known as alopecia or baldness, refers to hair loss from the head or any part of the body. This usually involves scalp hair loss. The severity of hair loss can vary from a small area to the entire body. It usually does not have swelling or scarring. ther are many reason for hair fall or loss like hair falls due to change in hormones, hair fall problem occurs in hair due to infection, hair fall begins due to nutrient deficiency, hair fall begins due to nutrient deficiency, hair fall starts due to hormonal changes, genetics etc.