The first thing you need to do is to get rid of the problem.
Women may have a small amount of menstrual blood remaining in the vaginal depths within one to three days after menstruation, at this time the cervical opening is loose, coitus is easy to bring in bacteria to cause retrograde infections, leading to endometritis, adnexitis, etc., appearing menstrual dribbling, abdominal cramps, abdominal pain and other discomfort, so it is best to prohibit coitus within three days after menstrual cleansing.
Three days after menstruation, the blood remaining in the vagina is basically discharged, and the cervix returns to tightness, so you can have sex.
Women should pay attention to personal hygiene, especially before intercourse with warm water to wash the vulva, change underwear, underwear should be cotton loose. Do not eat spicy cold food when menstruation. Couples who do not plan to have children should take contraceptive measures during intercourse.