This symptom should be related to excessive secretion of saliva in the body, which may be caused by indigestion, or inflammation of the stomach, gastritis, and gastroesophageal reflux. Patients with the above diseases may also have clinical symptoms such as pain and distension in the upper abdomen, as well as a burning sensation behind the sternum, or pain in the stomach after emptying. It is important to pay attention to the diet, mainly light, avoid eating some stimulating, greasy, cold food, try to avoid drinking strong tea, strong coffee, as well as avoid eating acidic substances or sucrose-based food, which can easily lead to excessive secretion of stomach acid. In addition, it is advisable to go to the hospital for a gastroscopy to clarify whether these diseases are caused by the above.