Gas in the stomach, or bloating, can be caused by chronic gastritis, indigestion, and irritable bowel syndrome. It can be solved by medication, improved diet and surgery. 1. Indigestion: mainly seen in eating too fast, too much, or eating food that is not easy to digest, thus producing bloating. You can use hot towels, hot water bags to do abdominal hot compresses, but also clockwise massage abdomen, promote intestinal peristalsis. In a short period of time, do not eat sweet potatoes, soybeans and other easily gas-producing foods, eat more easily digestible foods such as noodles. 2. Chronic gastritis: If when the mucosa inflammation, it will slow down the gastric power, resulting in gastric exhaustion is affected, so you will feel bloating. It is usually caused by Helicobacter pylori infection, and can follow the doctor’s advice to take the quadruple program containing bismuth, such as omeprazole + amoxicillin + clarithromycin + bismuth potassium citrate for the eradication of Helicobacter pylori treatment. 3. Irritable bowel syndrome: Due to gastrointestinal dysfunction and abnormal gastrointestinal motility, it will lead to the symptom of flatulence, and the patient suffers from abdominal distension. Drugs for treating motor dysfunction and gastrointestinal spasm, such as otiponium bromide tablets, can be used. There are other causes of gas in the distended stomach, so if the symptoms of flatulence persist or worsen, it is recommended to go to the hospital in time, identify the cause and treat it.