Acid swallowing is mainly a condition of pharyngeal xerostomia caused by increased sensitivity in the throat. There is often a sensation of foreign body or itching. For this symptom, there is often a feeling of acidity and swallowing action. Acid reflux mainly refers to the increase in acidity of the stomach, which leads to the relaxation of the cardia sphincter and causes a large amount of acid to flow back into the esophagus. It is characterized by a burning sensation behind the sternum, accompanied by chest tightness, wheezing and coughing. Acid reflux is mainly caused by the increase of acidic secretion of the stomach due to various reasons, such as emotional stress or stress. In this case, there is no reflux, but a local burning sensation due to a large increase of stomach acid, accompanied by abdominal distension, nausea, and even vomiting, are the symptoms of acid reflux. The difference between these three is relatively speaking, we need to rely on the patient’s self-perception to further determine.