Crying poop after megacolon surgery, there may be constipation or small bowel colitis. 1. Constipation: the most common complication after colon surgery is constipation, because there is no ganglion cell lesion caused by the intestinal segments of the residual, at this time the surgery is not complete, secondary to the absence of nerve cells, affecting the function of the anorectal, the emergence of constipation, it is recommended that the patient pay attention to go to the toilet at regular intervals, the formation of regular bowel reflexes, and it is recommended to eat more fresh fruits and vegetables and so on. 2. Small bowel colitis: small bowel colitis can be induced after megacolon surgery, and it is a more serious disease, and the morbidity and mortality rate is also higher, so you need to carry out a review to determine whether there is the occurrence of small bowel colitis. Megacolon is due to genetic and environmental factors caused by the lack of ganglion cells in the colon, intestinal contents through the obstacle, thus causing secondary dilatation, clinical treatment can choose radical surgical treatment, resection of narrow intestinal segments without ganglion cells, preserving the anus, the prognosis is relatively good. Patients after megacolon surgery are recommended to consult the relevant departments of regular hospitals for treatment follow-up.