Left lower abdominal pain after exercise is commonly due to the following reasons: first, acute intestinal spasm, in the process of exercise will inhale a lot of air through the mouth, the air in the intestines down the discharge will lead to intestinal spasm, you can localize the hot compress, and hand clockwise gently rub the abdomen, the pain can gradually improve after the gas is discharged, you can also take some oral antispasmodic drugs, such as belladonna tablets. Second, local muscle damage caused by the exercise process can damage the abdominal wall muscles, local pulling pain, which can be physical therapy or hot compresses, while taking some oral drugs for mild analgesia, such as ibuprofen extended-release capsules or pain relief tablets. Thirdly, incarcerated hernia, some patients have hernia in the inguinal region, which will cause the hernia to reach the body surface from the inguinal canal after exercise, which will cause pain and need to go to the hospital for physical examination and abdominal ultrasound in time for clarification. In conclusion, if the abdominal pain persists, it is necessary to go to the hospital in time to clarify the cause.