Teenagers with gray hair may be due to mental factors, disease factors, genetic factors and other factors, need to cause, symptomatic treatment. 1. Mental factors: long-term mental stress, dull mood, physical exhaustion, etc. may lead to gray hair growth, it is recommended that the rules of work and rest, appropriate exercise, keep a happy mood. 2. Disease factors: diabetes, cancer, drugs, vitamin deficiencies and other diseases can lead to insufficient hair nutrition, melanin supply is insufficient, it is recommended to clarify the diseases that cause gray hair, the primary disease treatment. 3. Hereditary factors: people whose parents have less white hair are more likely to suffer from gray hair, and there is no obvious and effective treatment. If you are a teenager with gray hair, it is recommended that you go to your local dermatology hospital to find out the causative factors and then treat the cause and symptoms.