Lower left abdominal pain may be caused by intestinal spasm, irritable bowel syndrome and chronic colitis. 1. Intestinal spasm: walking can cause strong contraction of the smooth muscle of the intestinal wall, which can cause intestinal spasm, leading to sudden abdominal cramps, resulting in lower left abdominal pain, which can be relieved on its own. 2. Irritable Bowel Syndrome (IBS): a functional bowel disease without organic lesions, which mainly manifests as abdominal pain, diarrhea or constipation, abdominal distension, fatigue, insomnia, anxiety and other symptoms, which can also cause pain in the lower left abdomen. 3. Chronic colitis: a chronic inflammatory disease of the intestinal tract, mainly manifested in recurrent, mild and severe abdominal pain, diarrhea, abdominal distension and other symptoms, can also cause walking pain in the lower left abdomen without pain. There are many other causes of lower left abdominal pain, which should be emphasized, timely consultation, identification of the cause of the disease, and follow the doctor’s instructions for further treatment or therapy.