Foreign body sensation under the laryngeal node and shortness of breath can go to the hospital and improve laryngoscopy, gastroscopy and electrocardiogram to clarify the cause of the disease and treat the cause of the disease. 1. Laryngoscopy: foreign body in trachea and throat cancer can also lead to foreign body sensation under the larynx and symptoms of chest tightness and shortness of breath. Through laryngoscopy, new organisms can be found and tissues can be taken and sent to pathology analysis to make clear diagnosis and formulate treatment plan. 2. Gastroscopy: Gastroesophageal reflux disease (GERD) can be caused by gastric acid, pepsin and other components that burn the mucous membrane of the throat, causing a foreign body sensation in the throat and symptoms of chest tightness and shortness of breath. In case of such disease, it can be detected by gastroscopy. 3. Electrocardiogram: As myocardial infarction, myocardial ischemia can cause chest tightness, shortness of breath and foreign body sensation below the laryngeal nodes, it is necessary to improve the electrocardiogram examination to find out whether it is caused by cardiomyopathy in order to decide on the treatment plan. It should be noted that the causes of foreign body sensation under the laryngeal knot are more causes, it is recommended to go to the hospital to improve the examination, according to the cause of the disease and then formulate a treatment plan, do not self-diagnosis, in order to delay the treatment of the condition.