There are several cases of bloating and feeling big in the stomach: 1, eating in the wrong way, eating too fast, talking while eating, etc., can lead to a lot of air entering the intestines and stomach, resulting in symptoms of bloating. 2, like to drink carbonated drinks, soda, etc., these drinks will produce a lot of gas in the intestines and stomach, and often drink these drinks will have symptoms of bloating. 3, eat a lot of easily flatulent food. For example, bean food, potato food, onions, etc., these foods into the stomach and intestines will produce a lot of gas resulting in bloating. Some people are intolerant to lactose and do not digest well after drinking milk, which can also lead to bloating. 4, suffering from gastrointestinal diseases, such as gastric ulcer, gastritis, duodenal ulcer, colitis, intestinal tumors, etc., are prone to bloating, accompanied by diarrhea, bad breath, stomach pain, decreased appetite and other symptoms.