A smaller penis may be the result of some specific disease or physiological changes. There are two main ways to treat the condition of small penis, including their own health care and surgical treatment. The occurrence of a small penis is mostly due to psychological factors of the patient, and the treatment is mostly psychological guidance. As we age, the penis and testicles may become smaller. Self-care is to slow down one’s own aging and keep physically active, which can improve the quality of the body and avoid premature aging. Exercise keeps the body’s cells young and the body’s metabolism fast and always in good health. Healthy diet a good way to maintain the body, eating healthy food will keep the body healthy, the body needs to be replenished and will not cause a lack of nutrients in the body. Tobacco and alcohol are the main causes of aging of the body and when patients have problems, they can stay away from substances such as tobacco and alcohol. Surgical treatment mainly helps with the patient’s erection problems. Most men have trouble getting an erection after surgery because the tissue in the penis reduces the amount of oxygen-rich blood. Treatment is needed for this condition. Surgery is usually used, which is a type of surgery known as penile rehabilitation. The problem of a smaller penis is mainly caused by ageing problems and the patient can choose the treatment according to his condition.