The causes of gray hair on the right side of the head include physiological factors, genetic factors, mental factors, pigmentation disorders and so on. 1. Physiological factors: with age, hair follicles gradually aging, tyrosinase activity in melanocytes decreased, so gray hair. 2. Genetic factors: young people appear white hair may be genetic factors, usually gathered in the family. 3. Mental factors: prolonged mental tension, anxiety or violent mood swings, can also appear the symptoms of gray hair. 4. Pigment disorder diseases: such as vitiligo, albinism and other diseases, there are melanin synthesis disorders, can also appear white hair. The right side of the head appeared white hair, do not panic, usually pay attention to regulate the mental state, to ensure adequate sleep, if necessary, to the hospital, follow the doctor’s instructions for treatment.