If there is pain in the left lower abdomen, the most common cause is inflammation of the adnexa, which includes local inflammation of the ovaries, inflammation of the fallopian tubes, and inflammation of the uterine ligaments. This pain often worsens during menstruation, after sex or exertion. A preliminary diagnosis can be made through gynecological and ultrasound examinations. It can be treated with broad-spectrum antibiotics combined with metronidazole for anaerobic bacteria. It is recommended to use the medication for one week to significantly relieve the pain. It is recommended to exclude inflammation of the intestinal tract or urinary stones, and it is suggested to give a comprehensive analysis with the clinical history. If it is an inflammatory disease of the intestine, there will often be a change in the stool pattern. In the case of urinary stones, there are often abnormalities in the urine.