At the age of 18, the appearance of white hair at this time, if it is accidentally found a few, mostly related to recent late nights, fatigue, stress, emotional depression and other factors, do not worry too much. If it is a lot of white hair, or the trend of growing more and more, it may be the onset of adolescent gray, commonly known as less white head, often due to congenital genetic factors. The main reason for the appearance of gray hair at the age of 18 is to remove the triggers, adjust the pace of life and study, increase diet and nutrition, avoid staying up late, relax and treat diseases such as hyperthyroidism. If the onset of gray hair in adolescents is caused by genetic factors, there are generally no effective treatment measures. Severe cases can choose suitable and qualified hair dyes to dye their hair according to their needs.