Whether a person will die after a long time without defecation mainly depends on the cause of the disease and the degree of the disease, if the intestinal obstruction is life-threatening, if simple constipation caused by the general non-life-threatening. 1. Intestinal obstruction: generally intestinal adhesions, tumors and other causes of intestinal obstruction for a long time without defecation, may be induced intestinal necrosis, intestinal perforation and other conditions, there will be life-threatening. 2. Constipation: generally can be caused by intestinal diseases, mental stress and other factors, there can be a long time without defecation, generally after the cause is clear, symptomatic treatment can be improved, so it is generally not life-threatening. Prolonged absence of defecation of the cause, the condition of the risk is different, it is recommended that such a situation should be timely medical treatment, so as to avoid delays in treatment.