Constipation may cause abdominal pain, which may be related to fecal blockage of the intestinal tract, intestinal cramps, intestinal gas accumulation and other reasons. 1. Fecal matter blocking the intestinal tract: in the case of long-term constipation, a large amount of fecal matter is blocked in the intestinal tract, and over time, the intestinal contents are getting more and more, which makes the intestinal tube expand abnormally and may cause abdominal pain. 2. Intestinal spasm: If there is constipation for a long time, the feces can not be discharged from the body in time, and the feces are blocked in the intestines, which stimulate the intestinal mucosa for a long time to produce intestinal spasm, thus causing abdominal pain. 3. Intestinal gas accumulation: long-term constipation, a large number of feces are accumulated in the intestine, the intestinal tract does not circulate, there will be a serious accumulation of gas, which may also lead to abdominal pain. Constipation may have other causes of abdominal pain, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.