White hair is inherited, and premature white hair causes stress.

White hair is a natural part of the aging process; however, premature white hair occurs when white hair appears earlier than the average age (whites before their 20s, Asians and blacks before their 30s).

Premature white hair looks the same as normal white hair, but there is a difference in the distribution of occurrence. White hair occurs in the order of the sides, front, and back of the head, but premature white hair is usually scattered throughout. In general, it is known that the biggest factor in the appearance of white hair is genetics. If a person's parents have white hair, it is likely that they will have white hair as well, and if parents begin developing white hair early, their offspring may also develop white hair early.

However, white hair in youth can be a major source of stress. When you are stressed, the supply of nutrients to the hair roots may be reduced or melanin production may be reduced due to hormonal imbalance and the production of free radicals. Anemia or nutritional deficiency can also cause hair cell aging. Lifestyle choices can also have an impact on the development of white hair. Westerners are more likely than Asians to develop white hair because eating a lot of animal fat raises blood cholesterol and reduces the nutrients supplied to the hair roots. Furthermore, if you smoke and don't get enough sleep, your body temperature and blood circulation will drop, which can harm your hair.