The increase in the amount of discharge 30 days after cesarean section may be caused by infection of the uterine incision, residue in the uterine cavity or infection of the uterine cavity, which needs to be treated by using medicines, purging the uterus and other surgeries. 1. Uterine incision infection: the increase of bad dew 30 days after cesarean section may be caused by uterine incision infection, in addition, if there is uterine scar erosion at the incision site or localized small blood vessels seeping blood, this situation may also occur. Amoxicillin and other anti-infective treatment is needed, if the infection can not be controlled, surgery is needed to re-sew the uterine incision, if necessary. 2. Uterine cavity with residue: 30 days after cesarean section, the increase of bad dew may also be caused by the uterine cavity with residue can not be discharged, you need to use the uterus to promote contraction of the uterus, to promote the discharge of the residue. 3. Uterine cavity infection: 30 days after cesarean section, the increase in bad dew may also be caused by infection in the uterine cavity, patients need to use amoxicillin, metronidazole and other anti-infective treatment, if necessary, to carry out surgical treatment of the uterus. It is recommended that once a patient finds himself 30 days after the cesarean section after the increase in malignant discharge, timely medical perfect relevant examination, standardized treatment. In addition, drugs may cause certain side effects symptoms, should be used under the guidance of a doctor, do not blindly use drugs.