If you always have the urge to have a bowel movement at night but do not have a bowel movement, it may be caused by irritable bowel syndrome, chronic enteritis, perianal abscess, intestinal tumors and other reasons. 1. Irritable bowel syndrome: due to mental tension, anxiety and stress, irritable bowel syndrome can be induced, which manifests itself as a sense of urgency and heaviness, and there is always a desire to defecate, but the situation of defecation does not come out. In the soothing emotions, release the pressure can be gradually improved. 2. Chronic enteritis: the intestinal mucosa is infected by pathogenic bacteria triggering inflammation in the intestinal tract, the inflammation stimulation can lead to a sense of urgency and heaviness, defecation, so there is always the urge to defecate at night, but not defecate. 3. Perianal abscess: It is caused by the infection of perianal inflammation tissues and interstitial space, which is manifested as perianal pain, inflammation stimulation of the anus, and the feeling of having the urge to have a bowel movement all the time at night, but not having a bowel movement. 4. Intestinal tumor: Because the tumor volume is relatively large, it can lead to obstruction of fecal discharge, so there is intention to defecate, but not defecate. If the tumor is in the rectal area, it can cause irritation due to the tumor, which can lead to urgency and heaviness, and it can also be manifested as having the urge to have a bowel movement all the time at night but not having a bowel movement. If you have the urge to have a bowel movement at night but do not have a bowel movement, it is recommended to consult a doctor in time to find out the cause of the problem and follow the doctor’s instructions.