Chest tightness and coughing after gastroscopy may have caused some irritation to the throat. Gastroscopy is through the use of a slender soft tube into the stomach, so as to observe the stomach and esophagus and other parts of the changes in the process of insertion, it is likely to cause a certain amount of irritation of the throat, and may even lead to minor damage to the mucous membrane of the throat, thus causing irritating cough symptoms. Most of the chesty cough after gastroscopy is not serious and will gradually relieve itself. If it continues to be unrelieved, it is recommended to consult a doctor in time to check for other underlying diseases such as coronary heart disease.