The cough and sputum in the elderly are mostly due to the following reasons: 1. Pay attention to the possibility of other diseases, such as tuberculosis, lung tumors, etc. If there is a combination of tuberculosis or lung tumors, specialist treatment is needed to improve. 2. If the elderly have underlying lung disease, they need to be treated for the underlying lung disease, and their diet should be strengthened with nutrition and less oily, spicy and stimulating food.