Constipation with a big, hard, bulging stomach may be caused by poor diet, irritable bowel syndrome, colitis and other reasons. It can be improved by strengthening exercise, reasonable diet, oral medication and forming good bowel habits. 1. Strengthening exercise: Encourage participation in exercises that are within your ability, such as walking, walking or massaging the abdominal muscles with both hands for several times, in order to strengthen the peristaltic ability of the intestines and help defecation. 2. Reasonable diet: Eat more food containing crude fiber and vegetables, fruits and beans, such as bananas, celery, sweet potatoes, etc.; drink more water, at least 1,500 ml of water per day, especially a cup of warm water in the morning or before meals, which will help the feces to be discharged. 3. Oral medication: If the above situation cannot be improved by strengthening exercise and reasonable diet, you can take domperidone, mosapride and other prokinetic drugs orally to promote intestinal peristalsis. You can also try oral lactulose, compound polyethylene glycol electrolyte bulk and other laxatives, while increasing the amount of water to promote the smooth flow of stools; you can also anally use corkscrew to relieve symptoms. 4. Form good defecation habits: if long-term constipation, you can practice defecation every morning to form a conditioned reflex. Constipation stomach big, hard bulging, there are other reasons, if the constipation is serious, there is obvious abdominal pain, abdominal distension, should be timely to the hospital for medical treatment, line related examinations, such as abdominal flat film, abdominal CT, etc., to exclude organic lesions, a clear diagnosis, so as not to miss the condition.