The distension below the ribs may be caused by physiological factors, or it may be caused by functional dyspepsia, chronic gastritis, cirrhosis and other digestive diseases and pneumothorax, pleural effusion and other respiratory diseases. 1. Physiological factors: overeating, eating too much gas-producing food, such as beans, sweet potatoes, etc., can cause abdominal distension, manifested as distension below the ribs. 2. Digestive system diseases: functional dyspepsia is caused by gastric and duodenal dysfunction, which can have a series of symptoms such as postprandial fullness and early satiety; chronic gastritis is a chronic inflammation of the gastric mucosa caused by a variety of reasons, which can have epigastric discomfort, postprandial fullness, acid reflux, etc.; cirrhosis patients can also have symptoms of abdominal bloating, accompanied by decreased appetite, nausea and so on. 3. Respiratory diseases: pneumothorax, pleural effusion due to gas or liquid accumulation in the pleural cavity, resulting in increased pressure in the pleural cavity, compression of the chest wall, the diaphragm can cause symptoms of distension below the ribs. When the above situation excludes physiological factors, it is recommended to go to the hospital, and ask the doctor to make a judgment to clarify the cause of the disease.