The left lower abdomen of men mainly has three systems of organs: digestive system, urinary system and reproductive system. Some common diseases corresponding to it: first, is acute enteritis, causing spasmodic pain in the intestines; second, is urinary stones, causing renal colic, with more intense pain; third, is the testicles in men, inflammation of the epididymis can cause spasmodic pain in the left lower abdomen, usually swelling of the testicles and epididymis can be seen, and pressure pain is obvious. For patients whose abdominal pain cannot be relieved, it is recommended to visit the hospital not to take painkillers by themselves, otherwise the condition may be delayed.