The seriousness of intercourse during the use of pessary depends on the primary disease. If it is mycosis vaginalis or trichomoniasis, intercourse during the treatment period when the clinical symptoms do not disappear may lead to infection of the sexual partner, which is also serious. In the case of cervical inflammation or other vaginal inflammatory diseases, intercourse can reduce the efficacy of the medication and prolong the course of the disease, as it will take longer for the local symptoms to disappear after reducing the efficacy of the medication. Do not have intercourse during the treatment period for either disease, keep the vulva clean, stop taking the medication for 3-7 days after the clinical symptoms have completely disappeared, and then consider having intercourse after the review if no more medication is needed.