Stomach pain and inability to poop may be caused by constipation, gastrointestinal dysfunction, irritable bowel syndrome, intestinal obstruction and other reasons. 1. Constipation: Hard stools and difficulty in defecation due to low water intake, poor defecation habits, improper diet, etc. can lead to stomach pain and inability to poop. 2. Gastrointestinal dysfunction: patients due to nervousness, indigestion, gastritis, peptic ulcer and other reasons, affecting the power of the gastrointestinal tract, resulting in gastrointestinal dysfunction, will also appear in the abdominal pain, and can not pass stool symptoms. 3. Intestinal obstruction: Due to the obstruction of the passage of intestinal contents due to various reasons, abdominal pain, abdominal distension, and stopping of defecation and gas evacuation often occur. 4. Irritable Bowel Syndrome (IBS): mainly manifested as abdominal pain, diarrhea and constipation, etc. Diarrhea and constipation commonly occur alternately. The stomach bloating pain can not poop, there may be other reasons, if the patient’s symptoms of defecation difficulties persist, need to go to the hospital in a timely manner, so as not to delay the condition.