Smelly discharge may be caused by puerperal infection, which needs to be treated actively. Bad dew is formed when the shed uterine membrane mixes with blood and is discharged through the vagina after delivery. Normal discharge has a bloody taste but no odor and lasts for 4 to 6 weeks. However, when combined with puerperal infection, the bloody odor lasts longer and is accompanied by a foul smell, fever, abdominal pain and other symptoms, which can be diagnosed by ultrasound, gynecological examination and routine blood tests. Once it is clear that there is puerperal infection, it is necessary to follow the doctor’s instructions to give broad-spectrum, adequate and effective antibiotic treatment, such as cefuroxime sodium, tinidazole, etc., and appropriate nutrition and adequate vitamin supplementation in order to strengthen the resistance of the whole body. When there is a combination of perineal wound and abdominal incision infection, it is necessary to actively incise and drain the wound and change the medicine on time. Clinical postnatal discharge odor need to go to the hospital in time, in order to clarify the cause of the disease and active treatment.