Flatulence after megacolon surgery may be caused by slowing down of intestinal peristalsis, hypoproteinemia, or disorders of the body’s internal environment. You can get out of bed as soon as possible, carry out abdominal massage, and take medication if necessary. 1. After megacolon surgery due to anesthesia drugs, prolonged bed rest leads to intestinal peristalsis slowdown. At this time, you should massage the stomach, get out of bed early to reduce flatulence. 2. Abdominal distension can also occur when patients have hypoproteinemia. You can choose a semi-liquid diet that is easy to digest and high in protein. In severe cases, human albumin can be transfused for treatment. 3. Electrolyte disorders may occur after surgery, such as hypokalemia that may lead to intestinal distension. The cause of the disease should be clarified and can be treated with intravenous infusion of potassium, or eating fresh vegetables and fruits rich in potassium. After megacolon surgery, when physical discomfort occurs, timely communication with health care personnel, and early targeted treatment. The above medications should be administered under the guidance of a doctor.