The elderly dry cough and inhalation of irritating smoke, mental overstress and other physiological factors, but also with chronic pharyngitis, acute bronchitis and other diseases. 1. Physiological factors: when the elderly inhaled irritating smoke, mental overstress or poor living environment, easy to cause dry cough phenomenon. 2. Chronic pharyngitis: chronic pharyngitis can cause dry cough in the elderly. Disease and acute pharyngitis repeated episodes, gastroesophageal reflux, long-term tobacco and alcohol and other factors, can cause patients to appear dry throat, sore throat, dry cough and pharyngeal foreign body sensation and other uncomfortable symptoms. 3. Acute bronchitis: the disease is related to pathogen infection, physical stimulation and other factors. In the early stage of the disease, patients will have irritating dry cough, nasal congestion, sore throat, hoarseness and other symptoms. As the disease develops, patients will also experience symptoms such as sputum, chest tightness and shortness of breath. Therefore, when the elderly suffer from acute bronchitis, the phenomenon of dry cough can also occur. In addition, tuberculosis, tuberculous pleurisy, bronchiectasis, lung abscess, lung cancer, cough variant asthma, eosinophilic bronchitis, lung tumors and other diseases can cause dry cough in the elderly. It is recommended that patients seek timely medical examination in order to clarify the disease and then treat the symptoms.