The 16-year-old male masturbation twice a day is normal and needs to be judged according to whether it produces uncomfortable symptoms. 16-year-old boys, who are usually in their puberty, are influenced by the secretion of androgens, which produce sexual desire and sexual pleasure. So moderate masturbation is normal. However, excessive masturbation is likely to lead to a series of abnormal physical symptoms, such as dizziness and tinnitus, lack of concentration, urogenital dysplasia, etc., which can affect normal learning and life. The two times a day is excessive, there are two principles to judge: one is not to affect the next erection, the second is the reproductive system and body without discomfort symptoms. If the symptoms of discomfort have appeared, it is recommended to abstain from masturbation as much as possible, and serious discomfort requires timely medical examination and treatment.