1, hair loss only affects external image, not physical health;

2, most people's hair only falls on the forehead or the top of the head, and the hair on the back pillow will not fall, because it is a long-lived hair follicle. If the back pillow falls off, there is the possibility of alopecia areata;

3, alopecia areata is a kind of mental alopecia, it is a hair, if the hair does not grow for several months, it should be prevented in time to avoid expanding the area.