Growing gray hair at a young age may be caused by physiological factors such as heredity, or pathological factors such as excessive stress, malnutrition and vitiligo. 1. Physiological factors: common factors include heredity, etc. Some patients are due to genetic factors, i.e., parents are prone to gray hair when they are young, and their children are also prone to gray hair when they are young. 2. Pathological factors: (1) Excessive pressure: With the fierce competition in the society nowadays, young people carry too much pressure in their lives, which may lead to various psychosomatic diseases and impair the function of melanocytes in the hair follicles, thus producing gray hair. (2) malnutrition: part of the population picky eaters, the body lacks a variety of trace elements, these trace elements may be the synthesis of melanocyte metabolism of essential substances, which may also produce white hair. (3) vitiligo: the cause of the disease is not yet clear, is a variety of reasons lead to the destruction of melanocytes in the epidermis, thus forming pigmentation loss spots on the skin, if located in the scalp, involving local hair follicles, will also appear the symptoms of white hair. The young long white hair patients need to pay attention to balanced nutrition, adjust the mood, maintain physical and mental pleasure, such as accompanied by other symptoms, it is recommended to go to the hospital for a clear diagnosis, under the guidance of the doctor standardized treatment.