There are many reasons for daily afternoon stomach pain, specifically the following reasons: 1, if there is pain in the upper abdomen every afternoon, it is likely to be caused by gastric disease or hepatobiliary disease, gastric disease mainly includes gastric ulcer, gastritis, and even the possibility of gastric cancer, hepatobiliary diseases include chronic cholecystitis, hepatitis, etc., should go to the hospital for timely examination and symptomatic treatment. 2, daily afternoon stomach pain belongs to the lower and middle abdomen The pain is mostly caused by chronic enteritis, chronic enteritis can also lead to intestinal dysfunction, intestinal flatulence, intestinal spasm and intestinal dysfunction, etc., can be diagnosed in the hospital with the appropriate examination, if necessary, to do colonoscopy to make a clear diagnosis.