Abdominal flatulence and nausea may be due to improper diet, or intestinal obstruction, chronic gastritis, peptic ulcer and other diseases. 1. Improper diet: Eating too much greasy, meat and other indigestible food, resulting in indigestion, food accumulation in the digestive tract, resulting in abdominal distension and nausea; and eating too much gas-producing food, such as radish, sweet potatoes, abdominal distension and nausea can occur. 2. Intestinal obstruction: intestinal tumors, parasites, fecaliths, etc. lead to intestinal obstruction, food and feces downstream obstruction, resulting in abdominal distension and nausea. 3. Chronic gastritis, peptic ulcer: Helicobacter pylori infection leads to gastric congestion, edema, mucosal atrophy, ulceration and other changes, digestion and absorption function is reduced, abdominal distension, nausea symptoms. Abdominal bloating and nausea should be to the hospital, clear cause, under the guidance of the doctor according to the cause of treatment.