There are many reasons for not having a bowel movement for five or six days, such as physiological factors such as low intake of food, constipation, or disease factors such as intestinal obstruction. 1. Physiological factors: If the patient is in the fasting stage, or the daily intake of food is small, there is a possibility that the phenomenon of five or six days without defecation will occur, but generally no other symptoms. 2. Constipation: such as drinking less water, rarely eat vegetables and fruits, or do not like to exercise, etc. can cause constipation, that is, the symptoms of five or six days without defecation, can also be accompanied by abdominal distension, abdominal pain and other symptoms. It is recommended to adjust the diet to eat more vegetables and fruits, drink more water, and maintain a moderate amount of exercise. 3. Disease factors: when suffering from intestinal tumor or intestinal obstruction, it will lead to the symptom of not having bowel movement for five or six days, which may also be accompanied by symptoms such as stopping of defecation, abdominal pain, abdominal distension, abdominal mass and so on. Five or six days without defecation, there are many other reasons, such as hemorrhoids, anal fissure, etc. It is recommended to actively seek medical attention, improve the examination, clear diagnosis, symptomatic treatment.