Fishy odor of post-caesarean section discharge is often associated with wound infection, vaginitis, uterine cavity infection and other factors. Common causes and treatments 1, wound infection: In addition to the fishy odor of the discharge, if the maternal wound appears red, swollen, painful, pus and other symptoms, you need to consider the possibility of infection of the incision. If the symptoms are mild, you can first local application of povidone-iodine wipe disinfection, to see if the situation is improving, if there is no improvement or serious symptoms, you need to go to the hospital to clean up and secondary suture, commonly used antimicrobial drugs have penicillin; 2, vaginitis: such as mycotic vaginitis, often associated with poor immunity, do not pay attention to personal hygiene and other factors. After delivery, maternal weakness, pathogenic bacteria easy to take advantage of the weakness, if this time not timely replacement of maternity pads and other personal items, so that the excessive proliferation of germs, which in turn led to mycosis vaginalis, triggering abnormal leukorrhea, foul smelling discharge and other symptoms. Commonly used antifungal drugs for treatment; 3, uterine infection: if the uterine cavity has residual placenta or fetal membranes and other tissues, or pathogenic bacteria from the outside world invasion, easy to lead to inflammatory infection of the uterine cavity, so that the increase in bloody discharge, accompanied by a fishy smell. An ultrasound of the uterine adnexa should be done in order to find out what is going on. At this time should be hospitalized, and under the guidance of the doctor to apply uterotonin or antibiotics for treatment, such as new biochemical particles, penicillin, etc.; 4, other: cervicitis, cervical polyps, cervical malignant lesions and other diseases can also lead to maternal discharge of fishy-smelling discharge after cesarean section, should be combined with specific symptoms, vaginal secretion examination and the results of the report of the cervical biopsy to confirm the diagnosis. Generally speaking, cervicitis can be treated with amoxicillin under doctor’s supervision, while cervical polyps and malignant lesions of the cervix require surgical treatment. Note: Mothers should pay attention to personal hygiene, wash their private parts with running water, and change their personal clothing and bedding regularly. In addition, do not start sexual life too early to avoid infection.