Left lower abdominal pain may be caused by urinary stones, intestinal obstruction, sigmoiditis or tumor, etc., which can be treated by oral tamsulosin, using soap and water enema, oral antibacterial drugs, etc. 1. Urinary stones: patients with left lower abdominal pain may be left ureteral stones and other urinary stones, can be relieved by oral tamsulosin, if the stone is large, the need for surgical treatment, such as extracorporeal lithotripsy, percutaneous nephrolithotripsy, and so on. 2. Intestinal obstruction: Intestinal obstruction may also cause pain in the lower left abdomen, which can be treated by enema with soap and water, with attention to fasting, water, and intravenous nutrient supplementation. If the enema can not be cured, then surgery is needed to relieve the obstruction. 3. Sigmoid colonitis or tumor: because the sigmoid colon is mainly located in the left lower abdomen, if it is sigmoid colonitis or tumor, especially acute colitis, it is easy to appear in the left lower abdominal pain, accompanied by diarrhea, stool with blood and other symptoms. It can be treated by oral antibacterial drugs such as ciprofloxacin hydrochloride tablets; or actively go to the hospital for examination to clarify the cause of the disease before treatment. When patients have left lower abdominal pain, they should go to the hospital in time to clarify the cause of the disease and take appropriate treatment programs, and do not use medication privately.