During menstruation, you should not have intercourse even with a condom. There are many hidden dangers to a woman’s health when having intercourse during her menstrual period. Although the process of having intercourse with a condom reduces the chance of gynecological infections such as endometritis, it does not completely eliminate the occurrence of gynecological infections. And wearing a condom during menstruation does not prevent menstrual blood reflux and endometriosis caused by extrusion and stimulation, and may still lead to endometriosis and secondary dysmenorrhea and infertility due to menstrual intercourse. At the same time, intercourse during menstruation, with or without a condom, can lead to increased pelvic congestion due to sexual stimulation, causing or aggravating the symptoms of back pain during and after menstruation. Sex, including condom use, should be absolutely prohibited during a woman’s menstrual period.