What is the reason why hair is not long?

Hair growth requires a variety of vitamins, protein and blood supply, hair is not long and the following reasons: 1. Young people, office workers do not eat regularly, in order to maintain a diet or insufficient meat intake, resulting in vitamin, protein deficiency, can not supply hair growth needs, resulting in hair is not long. The blood contains nutrients, the head blood circulation is faster, the hair absorbs more nutrients, and the growth is fast. On the contrary, the head blood circulation is not good, and the scalp metabolism slows down, which will affect the hair growth. 3. Patients with ringworm, scalp folliculitis or scalp trauma, hair follicles are damaged, destroyed, resulting in hair follicle function degradation, hair will not grow or fall off, as long as the hair follicle function returns to normal hair growth will return to normal, shed hair can grow again.