Causes of stomach pain that gets better after having a bowel movement include gastrointestinal tract dysfunction, gastroenteritis, colitis, and so on. 1. Gastrointestinal tract dysfunction: due to unclean diet, consumption of stimulating food, greasy food, etc., stimulating the smooth muscle of the stomach, triggering spasmodic contraction of the smooth muscle, the symptoms of stomach pain, the pain symptoms will be slightly relieved after defecation. 2. Gastroenteritis: Due to the constant stimulation of inflammatory factors, the mucosa of the gastrointestinal tract becomes congested and edematous, and the gastrointestinal contents constantly stimulate the mucosa, which will cause the patient to experience gastric pain, and the pain will be relieved after defecation. 3. Colitis: If the patient suffers from colitis, when the food residue passes through the ulcerated colon, it will trigger intestinal spasm and pain. After defecation, the intestinal spasm will be relieved and the pain will disappear. If the patient appears to relieve pain after defecation, it is recommended that the patient go to the hospital in a timely manner to improve the relevant examination, to clarify the cause of the disease, so as to avoid adverse consequences.