Abdominal bloating with constipation may be caused by simple constipation, intestinal obstruction, intestinal tumor and other reasons. 1. Simple constipation: If constipation leads to long-term accumulation of feces in the intestines, it will cause certain pressure on the abdomen or pelvis, and feces will be fermented under the action of intestinal bacteria, which can lead to intestinal flatulence and make the patient feel bloated and the feeling of bloating is gradually aggravated with the prolongation of constipation. 2. Intestinal obstruction: When intestinal obstruction occurs, the intestinal tract is blocked and becomes narrower, and the contents can not pass through the intestinal tract, which will cause the contents to accumulate in the intestinal tract, leading to expansion of the intestinal lumen, which will make the patient feel bloating and swelling, and at the same time, defecation and exhaustion will be stopped. 3. Intestinal tumor: if the patient has intestinal tumor, it will cause the intestinal tract to be blocked by the tumor, and the tumor will cause the patient’s defecation habit to change, and there will be constipation, diarrhea and other manifestations, which will be accompanied by a feeling of abdominal distension. In addition to the above reasons, other diseases may also lead to the appearance of this kind of symptom, so it is better for the patient to go to the hospital in time to seek the help of the doctor, listen to the doctor’s advice, and actively cooperate with the treatment.