Cough and sputum are very common symptoms, which are mainly seen in respiratory infections in clinic, such as acute bronchitis, cold, flu, chronic bronchitis, chronic obstructive pulmonary disease, pneumonia, bronchodilatation, pulmonary tuberculosis, lung malignant tumors, which can cause cough and sputum. It is recommended to improve the lung CT and take different treatments according to different causes. During the period of cough and phlegm, you can take oral cough suppressant and phlegm medication, or use nebulizer treatment to dispel phlegm, and during the period of coughing, it is also recommended to drink more warm boiled water, and eat a light diet, avoiding spicy and stimulating food, and at the same time, pay attention to rest, do not stay up all night.