The term “less white hair” refers to the premature graying of hair during adolescence, with the hair appearing white. The main causes include mental factors, poor nutrition, disease factors, bad habits, genetic factors, etc. 1, mental factors: If the patient is depressed, depressed or highly stressed, stressed, sleep deprivation, can make the hair from black to white at an early age; 2, poor nutrition: If the body long-term lack of protein, vegetable oil, vitamin B1, vitamin B2, vitamin B6 and other nutritional elements, will make the hair can not absorb nutrients, without the required enzymes to synthesize melanin, will also lead to Less white head; 3, disease factors: pituitary gland decline, hyperthyroidism and other endocrine disorders, tuberculosis, typhoid, pernicious anemia and other wasting diseases, plant nerve dysfunction, albinism, vitiligo, etc., are diseases associated with less white head; 4, bad habits: long-term brain work, often stay up late, lack of physical exercise, etc., can also induce less white head; 5, genetic factors: if If one or both parents have a history of less white head, the chances of their children having less white head will increase accordingly, which is a congenital factor.