Fixed position pain in the left lower abdomen may be bowel cancer, but it may also be chronic enteritis and pelvic inflammatory disease, patients are recommended to go to the hospital for a detailed examination to clarify the cause of the disease and then treat it in time. 1. Bowel cancer: In case of bowel cancer, there may be abdominal mass, diarrhea, constipation, alternating between the two, as well as change of stool shape, such as mucus stool, mucus-pus-blood stool, etc. In this case, patients should go to the hospital for a detailed examination in time and undergo surgery, chemotherapy or radiotherapy. 2. Chronic enteritis: If the patient has a long-term improper diet or bacterial and viral infections, it may lead to chronic enteritis, inflammation stimulation of the intestinal tract may occur in the left lower abdomen in a fixed position of pain, you can use drugs under the guidance of the doctor for treatment. 3. Pelvic inflammatory disease (PID): If the patient is a woman, it may be due to pelvic inflammatory disease causing pain in the fixed position of the left lower abdomen, and may be accompanied by leucorrhea, loss of appetite and other symptoms, which can be treated under the guidance of a doctor. In daily life, patients should go to the hospital for examination in time if they have uncomfortable symptoms, so as to avoid aggravation of the condition caused by untimely treatment.