The fishy smell of malodorous dew after cesarean section is often related mainly to wound infection, vaginitis, uterine cavity infection and other factors. Common causes and treatment methods 1, wound infection: in addition to fishy odor, if the maternal wound appears red, swollen, painful, pus and other symptoms, you need to consider the possibility of incision infection. If the symptoms are mild, you can first apply local iodophor wipe disinfection to see if the situation improves. If there is no improvement or the symptoms are serious, you need to go to the hospital for debridement and secondary suturing, commonly used antibacterial drugs are penicillin; 2, vaginitis: such as mycotic vaginitis, often associated with poor body immunity, do not pay attention to personal hygiene and other factors. After delivery, the mother’s body is weak and pathogenic bacteria can easily take advantage of the situation. If the puerperal pads and other intimate products are not changed in time, the bacteria will proliferate and lead to mycosis vaginalis, resulting in abnormal leucorrhea and foul-smelling dew. 3. Uterine cavity infection: If there are residual tissues such as placenta or fetal membranes in the uterine cavity, or if pathogenic bacteria invade from outside, it is easy to cause inflammatory infection in the uterine cavity, resulting in increased bloody malodor with fishy odor. Ultrasound of the uterine adnexa should be done to understand the situation. In this case, you should be hospitalized and apply contraction or antibiotics for treatment under the doctor’s guidance, such as new biochemical granules, penicillin, etc.; 4. Other: cervicitis, cervical polyps, cervical malignant lesions and other diseases can also lead to the discharge of fishy-smelling malodorous dew after cesarean section, and the diagnosis should be confirmed by combining specific symptoms, vaginal discharge examination and cervical biopsy report results. In general, cervicitis can be treated with amoxicillin under the guidance of a doctor, while cervical polyps and cervical malignant lesions need to be treated surgically. The mother should pay attention to personal hygiene, wash her private parts with running water, and change her clothes and bedding regularly. In addition, do not start sexual life too early to avoid infection.