A big, hard, bulging stomach and frequent farting may be caused by intestinal flatulence, constipation and other diseases, and patients should seek medical attention in a timely manner to clarify the cause of the disease and then treat it. 1. Intestinal flatulence: chronic gastritis, cholecystitis, pelvic inflammatory disease and other factors can cause abdominal distension, often exhaust, the patient will also have diarrhea, constipation and other symptoms, should be actively seeking medical attention, looking for the cause of flatulence of the original disease, for the cause of treatment. 2. Constipation: If the above symptoms are accompanied by less than 3 bowel movements per week, dry stools and other symptoms, it should be considered constipation related, it is recommended to drink more hot water, eat more fresh fruits and vegetables, and if necessary, lactulose can be used under the guidance of a doctor for diarrhea. The above symptoms are recommended to consult a doctor in a timely manner, under the guidance of a professional physician as soon as possible, so as to avoid delays in the condition.