A large stomach after eating is considered to be caused by these factors such as excessive meal size, improper diet, and indigestion. If the patient has the habit of overeating and eating too much at one meal, which causes the contents of the gastrointestinal tract to increase causing the stomach body to be distended, so the situation of a large stomach will occur. If you like to eat foods that produce gas easily, such as soy products, onions, leeks, carbonated drinks, etc., these foods will easily produce gas after eating, and too much gas will gather in the stomach and cause bloating, so your stomach looks big. Usually, if there are patients with indigestion, due to the lack of digestive juice secretion gastric power is insufficient, gastrointestinal peristalsis is too slow. After the intake of food because of the inability to digest food in time, gastric emptying leads to delayed food stays in the stomach, which will produce a lot of gas through decay and fermentation, exceeding the capacity of the stomach so it will produce bloating and a large stomach.