Frequent coughing in the elderly may be related to respiratory, digestive, cardiovascular and central nervous system diseases. 1. Respiratory diseases are the most important causes, including pharyngitis, lung infection, tuberculosis, lung cancer, chronic bronchitis, chronic obstructive pulmonary disease, cough variant asthma, etc., which can cause damage to the mucous membrane of the trachea or bronchial tubes, irritation of the throat, etc., and all of them can cause frequent coughing. 2. Digestive system diseases, mainly refers to gastroesophageal reflux, due to gastric reflux can stimulate the esophagus, and cause cough performance. 3. Diseases of the cardiovascular system, mainly referring to cardiac insufficiency, causing pulmonary stasis or pulmonary edema, which can cause cough. 4. Diseases of the central nervous system, such as meningitis, encephalitis and other stimulation of the nasal mucosa and the glossopharyngeal nerve, can also cause cough. Specific causes need to be clarified after medical examination and treatment according to medical advice.