If the left side of the small abdominal pain after pregnancy, the most common clinical causes include: a. Because there has been chronic inflammation of the left adnexal area in the past, because there is chronic inflammation of the pelvis, the tissue will be congested, and after pregnancy the pelvis is in a congested state, so that the congestion of the inflammation itself is aggravated, so there will be pain in the left side of the small abdomen, it is recommended to combine the medical history, if necessary, oral antibiotics for The treatment. If this situation is accompanied by nausea, vomiting or frequent urination and painful urination, it may also be caused by the left ureteral stone, it is recommended to do routine urine tests and ultrasound, according to the results of clinical treatment should be given. Third, if the left small abdominal pain is accompanied by diarrhea, often caused by enteritis, it is recommended to combine clinical history, laboratory tests, and comprehensive analysis of auxiliary tests, and then give treatment after a clear diagnosis.