Gastric flatulence after lung nodule surgery may be related to factors such as non-recovery of postoperative gastrointestinal function, postoperative bed rest, and improper postoperative diet. 1. Gastrointestinal function not recovered: lung nodule surgery is general anesthesia surgery, because the gastrointestinal function is suppressed after general anesthesia, it takes a certain time to recover the gastrointestinal function after surgery, and during this period, gastric flatulence may occur, which is manifested as anorexia, nausea, vomiting and other symptoms. 2. Postoperative bedridden: after lung nodule surgery, because of pain, can not cooperate with the early bed activities, long time bedridden gastrointestinal function decline, gastrointestinal peristalsis is poor, gastric flatulence can occur. 3. Improper postoperative diet: after surgery, eating turnips, sweet potatoes, beans and other foods that are easy to produce a feeling of bloating, while producing more gas, which can lead to flatulence, or eating a larger amount of postoperative, can not be digested, can also appear flatulence. It is recommended that patients should inform their physicians of any discomfort after surgery, and symptomatic treatment should be given according to the cause of the illness.