Sudden bleeding after cesarean section may be a normal phenomenon caused by normal menstrual flow and patients should take care of it. It may also be caused by poor postoperative healing and diseases such as uterine adhesions, which can be treated with medication and surgery. 1. Normal menstruation: Sudden bleeding after cesarean section may be caused by good post-partum recovery and normal menstruation, which is a normal physiological phenomenon. Patients are advised to pay attention to nursing care, avoid eating cold and raw food, and ensure sufficient rest. 2. Poor postoperative healing: Poor healing after cesarean section can also lead to bleeding. Patients can follow the doctor’s instructions to take oral amoxicillin capsules, roxithromycin capsules and other antibiotics for anti-infection treatment. 3. Uterine cavity adhesion: For uterine cavity adhesion leading to sudden bleeding after cesarean section, patients can follow the doctor’s prescription oral cefixime tablets, erythromycin capsules and other antibiotics, but also oral estrogen medication such as estradiol valerate tablets, ethinyl estradiol cyproterone tablets and other estrogenic drugs. In addition, patients can also take surgical treatment, mainly hysteroscopic hysterosalpingectomy. When patients experience sudden bleeding after cesarean section, if it is caused by menstrual flow, no treatment is needed. If it is caused by a disease, the patient should consult a doctor in time and follow the doctor’s instructions for treatment.