Smelly discharge from a normal delivery is not muffled, but rather the presence of an infection inside the uterine cavity. Consider that it may be endometritis, but also may be the placenta, fetal membrane residue and lead to infection in the uterine cavity. Normal menstrual discharge has a bloody odor, no fishy smell, and the time for the discharge to be clean is 4-6 weeks. If there is a foul odor and the duration of the discharge is prolonged, it is an abnormal situation. If there is infection in the uterine cavity, antibiotics should be considered to actively carry out anti-inflammatory treatment through ultrasound. If the placenta or fetal membranes remain, according to the specific area of the examination. If the area is relatively small, medication can be taken to activate blood circulation and remove blood stasis; if the area is larger, it may need to be treated by surgical removal of the uterus if necessary.