The main reasons for the absence of menstruation in the small stomach pain are ectopic pregnancy, ruptured corpus luteum and cervical adhesion, etc. Patients should combine their other specific symptoms and abdominal ultrasound report results to confirm the diagnosis. Common causes and treatment methods 1, ectopic pregnancy: If the patient has recently had measureless sex, it is necessary to consider that abdominal pain stops being triggered by ectopic pregnancy, and abdominal pain is one of the typical symptoms of ectopic pregnancy. At this time, the patient should go to the hospital for a clear diagnosis to avoid bleeding caused by the rupture of the gestational sac; 2. Luteal rupture: in addition to abdominal pain, the patient can also be accompanied by nausea, vomiting, frequent urination and other symptoms. This disease is often caused by abnormal coagulation function, strenuous exercise, and impact on the abdomen. In this case, the patient should be sent to the doctor immediately, and those with mild symptoms can be treated with tranexamic acid and other hemostatic drugs, while those with severe symptoms need to undergo laparoscopic surgery to aspirate the accumulated blood and then perform electrocoagulation to stop the bleeding; 3. Cervical adhesions: when there is bruising at the site of cervical adhesions, the patient is prone to abdominal pain. The disease is often treated by cervical dilatation. After surgery, medications such as estradiol valerate and progesterone should be taken as prescribed by the doctor to prevent the cervical adhesions from reoccurring; 4. Other diseases: pelvic inflammatory disease, endometritis, cervicitis, endometriosis, ovarian chocolate cysts, etc. can also cause abdominal pain during the non-menstrual period. Pelvic inflammatory disease can be treated with antibiotic drugs, while endometriosis, ruptured corpus luteum and ovarian chocolate cysts require surgical treatment. The patient should pay attention to bed rest and avoid overexertion, and at the same time can eat more nutritious food, such as lean meat, eggs and milk, to promote physical recovery.