There are many main reasons for hair loss. Bad living habits, great mental stress and unhealthy diet can all lead to hair loss. There are two kinds of hair loss:

1. Hair follicles at the hair loss site are temporarily dormant. Generally, this kind of hair loss is due to the lack of nutrition in hair, which belongs to nutritional hair loss. This kind of hair loss will regrow through diet or drug supplementation.

2. Hair follicle necrosis at the hair loss site. Many people will not grow hair after losing their hair, because the hair follicles in the hair loss area are necrotic and the hair has no roots. The effective method for this phenomenon is hair transplantation, but the hair follicle necrosis in the hair loss area is invisible to the naked eye, and it is necessary to go to a regular hospital for hair follicle testing before further treatment.