Regurgitation usually refers to acid reflux, nausea, accompanied by hiccups, flatulence may be functional dyspepsia, chronic gastritis, peptic ulcer and other causes, but also may be an adverse drug reaction. 1. Functional dyspepsia: usually often overeat, eat greasy food, hard to digest food easily caused by indigestion leads to gastric peristalsis slower, delayed emptying of food in the stomach, the accumulation of food through abnormal fermentation produces a large amount of gas caused by acid reflux, nausea, hiccups, flatulence, can be accompanied by halitosis, loss of appetite and other symptoms. 2. Chronic gastritis: such as superficial gastritis, erosive gastritis, etc., due to the gastric mucosal damage and inflammation affecting the digestion of food, resulting in acid reflux, nausea, hiccups, flatulence, stomach pain and other symptoms. 3. Peptic ulcer: the protective barrier of gastric mucosa is eliminated, the formation of ulcer surface, can also lead to decreased digestive ability and affect the digestion of food regurgitation, nausea, burping, flatulence, heartburn, stomach pain and other symptoms. 4. Adverse drug reactions: taking non-steroidal anti-inflammatory drugs such as aspirin, ibuprofen, antibiotics such as azithromycin, penicillin, etc. There are gastrointestinal adverse reactions, which can lead to acid reflux, nausea, hiccups, flatulence and other discomfort. It is recommended to consult a doctor in time to inform him/her of the type of medication, the dosage, and the reason for taking the medication. Acid reflux, nausea, hiccups, flatulence may also be caused by other reasons, it is recommended to consult a doctor in a timely manner to identify the cause of the disease, and then follow the doctor’s instructions for treatment, so as to avoid delaying the condition.