Odor after intercourse indicates vaginal infection. When couples have intercourse, they should pay attention to their hygiene habits and wash their perineum for both men and women. If the odor is accompanied by increased discharge, you should go to the hospital for a routine examination of the leukorrhea and according to the results of the examination, you should be given medication to effectively treat vaginitis, either vaginal suppositories or oral medication. In general, most of the odor after intercourse is caused by anaerobic bacteria, so if the test is bacterial vaginosis or trichomoniasis, metronidazole suppositories can be applied vaginally once a day for 10 days as a course of treatment, and the leucorrhoea routine should be checked again at the end of treatment to understand the treatment of vaginitis. It is important to clean and disinfect underwear and used utensils.