If the patient has no vaginal pain before sex, there are many reasons for vaginal pain after sex, according to different situations to do different treatment: First, the pain is caused by inflammatory diseases caused by the patient not paying attention to hygiene after intercourse, you need to do gynecological examination and laboratory tests to determine the type of inflammation, and then choose the appropriate antibiotic treatment. When the patient has bacterial or trichomonas infection can choose metronidazole vaginal effervescent tablets, no sex can choose ornidazole oral, if the gonococcal infection can use cefixime, ceftazidime for treatment. Secondly, if the patient is allergic to the condom or diaphragm used for vaginal pain, the allergen needs to be removed and can be treated by applying topical cream. Thirdly, painful vaginal damage caused by rough intercourse can be observed without treatment if the damage is mild, or local edema can be treated by local cleansing with bitter ginseng lotion to clear heat and detoxify. If the injury is serious and bleeding, sutures are needed to stop the bleeding.