Slight abdominal pain with a small amount of bleeding is mainly considered to be related to ovulatory bleeding, the effect of intrauterine device, abnormal pregnancy, cervical lesions and other factors. Patients need to combine other physical symptoms to clarify the cause and then carry out targeted treatment.1. Ovulatory bleeding: If the patient has no other physical symptoms and is in the middle of the menstrual cycle, consider the possibility of ovulatory bleeding. At this time the patient has breakthrough bleeding from a small amount of endometrium due to fluctuating hormone levels in the body. There is a small break in the ovary during ovulation, and the follicular fluid discharged with the follicle may cause a little irritation to the pelvic peritoneum, causing abdominal pain. At this time, the patient can first observe, with the end of ovulation, the symptoms will generally disappear naturally; 2, intrauterine device: If the intrauterine device is not properly located, it can stimulate the pelvic cavity and cause abdominal pain. At this point, do not worry too much, the abdominal pain will gradually disappear with the extension of the IUD wearing time. If the abdominal pain persists, consider removing the IUD; 3. Abnormal pregnancy: such as pre-eclampsia, as the fertilized egg peels off the uterine wall, resulting in rupture of the endometrial vessels and bleeding, and uterine contraction can cause abdominal pain. In addition, ectopic pregnancy may also manifest as abdominal pain and vaginal bleeding, and the specific treatment plan should be decided according to the HCG value, the size of the mass and whether there is internal bleeding. The treatment needs to be decided according to the patient’s specific clinical manifestations and the results of cervical secretion culture; 5. Pelvic inflammatory disease: due to the infestation of germs, the pelvic cavity is severely congested, and under the action of inflammatory factors, symptoms such as ruptured blood vessels and bleeding may occur, which may also be accompanied by abdominal pain, fever, and increased vaginal discharge. Commonly used drugs for this disease are ceftriaxone sodium, cefoxitin sodium, metronidazole, azithromycin, etc. Patients should avoid bathing and swimming to avoid aggravation of the disease; 6. Other: endometrial polyps, uterine fibroids and other diseases can also lead to abdominal pain, vaginal bleeding and other symptoms, which are usually treated by surgical removal.