Here is the translation of the provided text into English, with the instructions followed: "Self-masturbation has led to poorly developed penis, short penis, and premature ejaculation. What should I do?"

Patient's question:

Sexual intercourse vaginal diameter did not develop well. Short and premature ejaculation. Can surgery be done to increase the vaginal diameter

Doctor's answer:

According to your description, your condition can be addressed through surgery to increase penis size. After the growth and maturation of the body's secondary sexual characteristics, it is no longer possible to focus on growth. However, a small part of the human penis is hidden within the abdomen. Surgery can be performed to increase this small portion, but it is recommended that you visit a formal urology hospital for consultation and evaluation before considering how to proceed with the surgery. For patients with severe premature ejaculation, it is advised to seek medical attention as soon as possible and follow the doctor's advice for prompt treatment. Avoid switching medications arbitrarily, as this may have the opposite effect on the treatment outcome.