The determination of belching and hiccups is based primarily on symptom presentation. Belching is characterized by a long, slow sound; hiccups are characterized by a short sound. 1. Belching: caused by a transient relaxation of the lower esophageal sphincter, the gas in the stomach passes through the throat and makes a sound. It is a long, slow sound, usually associated with depression, overfeeding, etc., and can be controlled. 2. Upset: caused by spasm of the diaphragm, the gas in the stomach passes through the throat with a sound. It manifests itself as a certain frequency of short bursts of sound, usually related to cold, stimulating diet, etc., and is usually difficult to control. Belching and eructation are both digestive symptoms, and the causes that can lead to these symptoms include having lifestyle and dietary causes such as depression, irritating diets, irregular diets, and overeating. There are also disease causes, such as reflux esophagitis, gastritis, and gastric ulcers. For the determination of belching and hiccups, it is recommended to visit a doctor to determine the cause with the specific manifestations.