It is not normal to have very smelly postnatal discharge, and it is important to consider whether there is a co-infection. Postpartum discharge is the shedding of uterine membranes after delivery, containing blood, necrotic membranes and other tissues discharged through the vagina. If the uterus is not fully recovered or some placenta and fetal membranes remain in the uterine cavity, or if there is a combination of infection, the discharge will increase, and the bloody discharge will last for a longer period of time and have a foul odor. Therefore, if there is a bad smell, we should consider the combined infection, if at the same time there is fever, uterine pressure and pain and other discomforts, you need timely treatment, under the guidance of the doctor to give broad-spectrum antibiotics, such as penicillin, cephalosporin and other control of the infection. Women should pay attention to personal hygiene after delivery, change and wash frequently, keep the vulva clean to avoid infection. If there is a very smelly discharge, you need to seek medical treatment.