Generally, the size of the penis is related to one’s own development, heredity, hormone secretion, race, etc. When the development stops, there is no way to make the penis grow longer, but the penis is extended by means of surgery. Minor males who have a short penis due to endocrine insufficiency can be treated by way of medication. 1 Surgery: Usually for patients with primary micropenis, or excessively short penis, usually surgery can usually lengthen the length of the penis by 2 centimeters to 3 centimeters. 2. Medication: Before the male is fully developed and mature, if the penis is short due to insufficient hormone secretion, the patient can be treated by applying medication to adjust the endocrine by way of treatment under the guidance of the doctor, such as gonadotropin-releasing hormone, testosterone, dihydrotestosterone and so on, which can help the penis to grow longer. If the length of adult male penis is within the normal range, that is, greater than 4 centimeters in the non-erectile state and greater than 7 centimeters in the erectile state, there is no need for treatment, and daily attention to physical exercise can be, such as pelvic floor muscle exercise and anal lifting exercise.