One month after childbirth, if there is a bad smell, it means that there is an inflammatory infection, which can occur when there is endometritis or pelvic inflammatory disease, and it is necessary to do an ultrasound examination to check or exclude any residual fetal material or inflammation in the uterine cavity. If it is determined that there is an inflammatory infection, then medication will be needed. If there is no problem with the ultrasound, a gynecological examination should be done to check the cervical opening to see if there is inflammation, which can be treated with intravaginal medication with celiac pessary or povidon suppository. You should also pay attention to hygiene and cleaning in the process of medication. You need to pay attention to your diet, do not eat spicy and irritating food, you should also pay attention to wear loose cotton underwear, so as to reduce the local skin stimulation, but also to keep the local dry.