The first thing you need to do is to identify the cause of the disease and focus on the treatment of the cause. Common causes include genetic factors, disease factors, etc., and can be treated with general therapy, medication, and so on. 1. Genetic factors: there is no effective treatment for gray hair at a young age caused by genetic factors such as albinism and adult progeria syndrome, and hair color can be changed by dyeing the hair. 2. Disease factors: autoimmune diseases, pernicious anemia, hyperthyroidism, vitiligo and other diseases can also lead to young long white hair, should be actively treating the primary disease, such as hyperthyroidism to anti-thyroid medication, vitiligo need to be used externally with glucocorticoid drugs such as halomethasone ointment and other treatment. The use of drugs are required under the guidance of medical professionals to avoid adverse reactions.