Constipation, intestinal obstruction, hemorrhoids, and enteritis are some of the diseases that cause the inability to pass stool. Patients with constipation have difficulty defecating due to dry stools, which accumulate in the intestine and exceed the capacity of the intestine, and the intestine peristalsis wants to defecate, but the stools are dry and cannot be defecated. In patients with intestinal obstruction, because the excretory channels in the intestinal cavity have been obstructed, too much stool accumulates in the intestine and exceeds the capacity of the gastrointestinal tract, and mutation occurs, but the stool cannot be pulled out because of poor excretion. Patients with hemorrhoids have a sensation of anal drop and a feeling of wanting to defecate due to the hemorrhoidal mass protruding outside the anus, but there is no stool to pass. Patients with intestinal inflammation may have more frequent bowel movements due to the inflammation in the intestines, which stimulates the intestinal wall and causes a feeling of wanting to pass stool, but there is no stool to pass because the bowel movement is already done.