. Excessive prepuce and phimosis are very harmful, such as 1. It is easy to cause various inflammations; 2. It is easy to induce penile cancer; 3. It is easy to cause masturbation; 4. It is easy to affect sexual life; 5. It is easy to cause infertility; 6. It is easy to cause phimosis incarceration; 7. It is easy to affect women's health. I suggest you pay attention to hygiene, go to the hospital for examination as soon as possible and accept circumcision. I wish you the best of health!