The causes of small penis are more complex, in addition to some patients with unknown causes of the onset of the disease, mostly due to genetic factors, hormone deficiency and other factors affecting the development of the penis. Unable to quit masturbation may be caused by mental stress and addiction. 1. Short penis: (1) Genetic factors: is an important factor leading to short penis, and other organs of the body, the size and shape of the penis is controlled and influenced by genetic factors. (2) Hormone deficiency: the hormone level in the body is disturbed and the hormone secretion is insufficient, which leads to the developmental disorder of the penis and causes the short penis. 2. Unable to quit masturbation: (1) Mental pressure: Masturbation is a way for young people to release sexual mental pressure, and the inability to quit masturbation may be caused by excessive mental pressure. (2) addiction: under normal circumstances, masturbation generally does not cause any disease, can not quit masturbation may exist in the phenomenon of addiction. If you can’t quit masturbating with a short penis, you should go to a regular hospital in time to find out the cause of the disease and take targeted treatment measures under the guidance of the doctor for a speedy recovery.