You should not have intercourse when your period is almost clean. At this time, your period is not completely clean and your cervix is not completely closed, so the bacteria or viruses brought into the vagina during intercourse can enter the pelvis through the cervix and lead to pelvic infection, pelvic inflammatory disease and endometritis. If you have intercourse during this period, bacteria can easily grow in the vagina and cause vaginitis. If you have intercourse during this period, bacteria may grow in the vagina and cause vaginitis. When your period is not completely clean, a small amount of endometrium may be shed in your uterus. It is best to wait until your period is completely clean before having intercourse, so as to prevent gynecological infections. When having intercourse, it is recommended to pay attention to vulva hygiene and wash with warm water before and after intercourse to avoid bacteria entering the vagina and causing inflammatory diseases.