The reasons for the appearance of head lines in 16-year-old teenagers are related to some bad habits and even malnutrition, in addition to genetic factors. 1. Genetic factors: the formation of headline has a certain heredity, for people who have obvious headline in their family, the chance of reappearance of headline will be significantly higher. In addition, it is necessary to pay attention to whether the patient has ptosis or not. When the ptosis patient opens his eyes, the frontalis muscle is needed to assist him because of the lack of power of the levator muscle, and the patient often has frontal wrinkles at an early age. 2. Bad daily habits: bad habits such as frowning, frowning, etc., muscle contraction is excessive, and in the long run, forehead wrinkles will be formed. 3. Malnutrition: prolonged malnutrition will lead to a decrease in the physiological function of the skin, and the skin will become loose, which will also lead to the premature appearance of forehead wrinkles. Teenagers need to ask a professional doctor for a face-to-face consultation when they have head lines.