Constipation can lead to abdominal pain. The main causes of constipation are dry stools, poor discharge, unclean stools, and a decrease in the number of bowel movements, so the causes of abdominal pain are mainly as follows: 1, because the intestinal feces can not be smoothly discharged, the increase in feces in the intestine, resulting in the expansion of the intestinal canal and thus abdominal pain. 2, because of the obstruction of feces, resulting in the gas in the intestine can not be smoothly discharged, long-term accumulation of gas can appear abdominal pain. 3.Because of long-term non-defecation, the feces in the intestine can stimulate the intestinal mucosa for a long time, which can lead to damage to the intestinal mucosa, resulting in intestinal spasm and abdominal pain. 4.Long-term non-defecation, the contents of the intestine increase, the food in the stomach can not enter the intestine smoothly after eating, long-term retention in the stomach and damage to the gastric mucosa, resulting in gastric spasm and abdominal pain. Abdominal pain occurs.