Stomach bloating after eating for a month may be caused by physiological bloating, indigestion, stomach diseases, abnormal gastrointestinal acid secretion, gastrointestinal power insufficiency and so on. 1. Physiological bloating: if the patient eats too much, the abdomen is cold, it will cause bloating after eating. 2. Indigestion: If the patient eats food that is difficult to digest, it may lead to bloating in the stomach. 3. Stomach diseases: if the patient suffers from acute and chronic gastritis, gastric ulcer, gastric dilatation, cirrhosis of the liver gastroduodenal disease, chronic hepatitis and other diseases, it will lead to stomach bloating after eating. 4. Abnormal secretion of gastrointestinal acid: If the patient’s gastric acid secretion is too much, and pancreatic fluid in the stomach to form carbon dioxide, resulting in patients with hiccups, bloating phenomenon. 5. Insufficient gastrointestinal power: If the patient’s gastrointestinal power is weakened, the gas in the stomach is difficult to be absorbed and discharged, thus causing gastric distension. It is recommended that patients go to the hospital in a timely manner, under the diagnosis of the doctor, to take targeted treatment.