Two days without bowel movement is generally normal if it is physiological reasons, if it is pathological reasons, such as constipation, intestinal obstruction and so on, it is an abnormal situation. 1. Physiological reasons: most people are generally 1-2 days 1-2 times bowel movements, if the patient in the weight loss, eating less may also appear 2 days without defecation, if there is no abdominal distension, abdominal pain, stool deformation, etc., is generally a normal phenomenon. 2. Pathologic causes: (1) Functional constipation: it may be caused by the slow peristalsis of the intestinal tract, which results in the contents of the intestinal lumen staying in the intestinal tract for a long time, and the water is over-absorbed and leads to dry stools that are not easy to be discharged. Or muscles such as anal sphincter peristalsis is not coordinated, resulting in prolonged retention of stool in the intestinal tract, appearing 2 days without defecation. (2) Intestinal obstruction: for example, when intestinal tumors, intestinal adhesions, etc., leading to narrowing of the intestinal tract, hindering the movement of stool, also appear 2 days without defecation, but generally may be accompanied by a change in the shape of the stool in the early stage. When there is no bowel movement for two days and accompanied by uncomfortable symptoms, it is recommended to consult a doctor in time, follow the doctor’s instructions for further examination, and choose a reasonable treatment plan under the doctor’s comprehensive analysis.