There are several reasons for bloating every night: 1. eating too much at night, eating too much food at night or eating too much food containing gas, such as sweet potatoes, barbecued food, or drinking a lot of carbonated beverages, which can easily bring gas into the body and cause gas. 2. lack of exercise immediately after meals, lack of effective exercise to help the intestines to peristaltic movement, which can easily cause intestinal flatulence. 3. gastrointestinal diseases, such as gastroenteritis, gastric ulcer and other diseases, after dinner is easy to cause gas. 4, eating too fast, eating too fast food is not chewed slowly, it will not be easy to digest in the intestines caused by gastric distension, stomach pain.