The main cause of gray hair in teenagers is due to the reduction of melanin. The causes of melanin reduction can be found in genetic factors, micronutrient deficiencies, vitiligo factors, etc., and need to be analyzed according to the symptoms.
1. Hereditary factors: teenage gray hair is an autosomal dominant disease, so if the parents are teenage gray hair patients, then the next generation may also appear less white head.
2. Trace element deficiency: for example, melanin synthesis is related to zinc. So if there is a lack of zinc in the body it may lead to a decrease in the synthesis of melanin, thus causing gray hair.
3. Vitiligo: it is a common acquired pigment loss skin and mucous membrane disease, which can involve hair follicles and clinically manifest as white spots or (and) white hair, thus causing teenage gray hair.
Teenagers long white hair may also have other reasons, it is recommended to timely to the regular hospital for examination, under the guidance of professional doctors for standardized treatment.