An elderly person’s dry cough is always likely to be caused by the following: i. It is commonly accompanied by chronic laryngitis, dry and itchy throat, cough and no phlegm. Second, if the dry cough is accompanied by chest pain, hoarseness, and wasting for a long time, pay attention to exclude lung tumors. Third, if the dry cough is accompanied by hemoptysis, low fever and night sweats, the possibility of tuberculosis should be excluded. Fourth, the elderly always have a dry cough and need to rule out cardiovascular causes, commonly heart failure. Fifth, if a patient with hypertension usually takes ACEI-type antihypertensive drugs, it is also necessary to exclude dry cough caused by drugs.