Failure to cut the foreskin, that is, failure to perform circumcision, will affect coitus, the foreskin may lead to the patient to develop diseases such as glansitis, but also lead to women to develop bacterial vaginitis, urethritis and other diseases. 1. Glansitis: There are many causes of glansitis, mainly due to bacterial infection and other factors. If the patient is circumcised, it may lead to bacterial infection of the glans and glansitis, and the patient will experience symptoms such as tingling, itching, redness and swelling of the penis and urethra, and pain and discomfort during coitus, which will affect the process of coitus. 2. Bacterial vaginitis: Bacterial vaginitis is not caused by a single causative agent, but may be the result of the joint action of multiple causative agents. If a male patient has a prepuce, it will cause bacteria to breed in the prepuce and enter the female vagina, which will cause bacterial vaginitis, and the patient will have symptoms such as increased vaginal discharge, vaginal itching, vaginal burning sensation, which will also affect the coitus. 3. Urethritis: Urethritis is mainly due to gonorrhea and other pathogens or sexual contact and other factors, the circumcision may lead to men suffering from urethritis, and at the same time, if men do not circumcision surgery, may also lead to women with urethritis, the patient will appear urethral itching, frequent urination, painful urination and other symptoms, which will affect the coitus. It is recommended that patients with circumcision seek medical attention in a timely manner and follow the doctor’s instructions for treatment.