The main reasons for feeling bloated stomach are: First, gastrointestinal flatulence or tumor, various causes of gastrointestinal dysfunction, such as neoplastic lesions, inflammatory lesions, intestinal vascular malformations, etc., can affect the peristaltic function of the gastrointestinal tract, slowing down peristalsis or increased gas production, gastrointestinal tract gas accumulation, causing abdominal distension. In addition, the elderly gastrointestinal peristalsis slows down, often combined with constipation, abdominal distension can also occur. Second, ascites, hepatitis, cirrhosis, hepatocellular carcinoma patients, liver function is often poor, there can be hypoproteinemia, portal hypertension, splenomegaly, so that the colloid osmotic pressure is reduced, fluid extravasation, ascites, pleural fluid and limb swelling.