Masturbation generally does not lead to penile shortening, penile shortening needs further diagnosis and treatment to find out the cause, active treatment. Masturbation is a normal physiological activity, moderate masturbation is harmless to the body or spirit, and will not lead to penis shortening, no need to worry too much. Excessive masturbation may stimulate the local mucous membrane, resulting in damage to the body’s local mucous membrane tissue, ulceration, bleeding, swelling, erosion and other symptoms. However, it usually does not cause penile shortening. Short penis may be related to hormone secretion abnormality, acquired developmental delay and other factors, it is recommended to be actively diagnosed and treated in regular hospitals. Therefore, in the daily need to establish the correct concept of masturbation, need to control the frequency of masturbation, pay attention to personal hygiene, keep the genital area clean and clean, change underwear, take a bath often. Regular work and rest, ensure sufficient rest time, do not overwork. If there is a short penis, it should be actively diagnosed and treated.