Most of the burning pain during coitus is related to vaginal inflammation, and what medication is used to treat it is related to the type of pathogen. If the increased discharge is thin, purulent, yellowish-green, foamy, it is a typical manifestation of trichomonas vaginitis, and should be treated with metronidazole topically or systemically, systemically is better than topically, and sexual partners should be treated at the same time. If the secretion is pea-slag-like, accompanied by severe vulvar and vaginal itching and restlessness, the possibility of mycosis vaginalis is greater, you can use clotrimazole, mycotoxin and other drugs vaginal drug treatment. If the vaginal discharge increases, has a fishy odor, and worsens after intercourse, the possibility of bacterial vaginosis is greater, which is related to the dysfunction of the flora in the vagina, and you can use anti-anaerobic drugs, such as metronidazole, clindamycin and so on. If there are symptoms of pain during coitus, you should go to the hospital and use medication under the guidance of a doctor to make it safer and more effective.