Pain in the stomach but can not pass stool is mainly caused by intestinal obstruction and constipation, which requires immediate examination and treatment. Many people will have abdominal pain along with the inability to pass stool, which should be alerted to be caused by intestinal obstruction disease. During the onset of intestinal obstruction, the intestinal system will be superimposed, and the intestinal contents above the obstruction will not pass smoothly and accumulate in the intestine, causing the intestinal canal to dilate due to the accumulation of the contents, which will not only cause pain due to nerve irritation, but also cause no stool in the intestine after the stool below the obstruction is discharged because it cannot be unblocked, and the patient will show that the stool does not come out. Patients with constipation have difficulty in defecating because of the prolonged accumulation of stool, which is excessively absorbed by the intestines, and during the process of defecation, not only do they have stomach pain, but some of them may also have the performance of not being able to defecate.