Just came to menstruation do not know coitus, for this case, the most afraid of pathogens upstream infection, this time the cervix is in a slightly open state, the body’s resistance is relatively poor, at this time it is easiest for pathogens to cause pelvic infection upstream. If the patient after intercourse, there is no uncomfortable performance, you can temporarily observe, do not need special treatment. If the patient has pain in the lower abdomen, a large amount of discharge, discharge odor and other discomforts after intercourse, you can further check the gynecological ultrasound and vaginal secretion test, according to the results of the ultrasound and vaginal secretion test, to decide how to treat the next step. You can choose to take oral antibiotics, metronidazole combined with cephalosporin drug treatment, if necessary, local vaginal drugs, such as nifurtimox, penicillin vaginal soft capsule and so on.