Hair falls out easily when it grows long and is categorized into physiological and pathological. Normal adults shed 100 hairs per day, and when the hair grows long, the hair that is shed every day will not carry on shedding smoothly, but remain in the scalp area. When you wash your hair, it will cause the hair shed within a few days to fall together, so it will look very much, which is a very normal phenomenon, do not need to worry, belong to the physiological hair loss. And pathological hair growth after the hair, mainly after the infection of fungi led to half hair loss, when the scalp part of the infection of fungi, will make the fungi destroy the quality of hair, in the process of gradual growth of hair, higher than the skin 1-2 centimeters will lead to hair loss, this situation will also be accompanied by local plaque-like desquamation, itching, touching with the hand with obvious bumps or depressions, you can choose to use antifungal medicine to carry on the treatment.