Poor lung function can be improved by proper exercise, avoiding high risk factors and giving appropriate treatment.

1、Appropriate exercise: doing breathing exercises, blowing up balloons, blowing up newspapers, moderate exercise can improve and maintain lung function. The amount of exercise should be decided according to the patient's lung function and clinical symptoms, and it is not recommended to exercise strenuously to avoid dyspnea.

2、Avoid high-risk factors: Factors that can lead to a decline in lung function include smoking and intrapulmonary infections. Therefore, it is necessary to quit smoking, pay attention to rest, avoid cold, and avoid intrapulmonary infections.

3、give the appropriate treatment: if the patient is due to chronic obstructive pulmonary disease and lead to the deterioration of lung function, according to the condition of the patient need to use cough suppressant, expectorant, asthma and other related drugs for treatment. If the patient's lung function is poor because of bronchial asthma, oral montelukast sodium, inhalation budesonide, formoterol can be used according to the condition. If the patient's poor lung function is caused by tuberculosis, anti-tuberculosis drugs need to be used for treatment, commonly used drugs include isoniazid, rifampicin, pyrazinamide, streptomycin and so on. If the patient's poor lung function is caused by lung malignant tumor, surgical treatment, radiotherapy, chemotherapy, target cell drug therapy, gene therapy, immunotherapy, etc. should be considered according to the condition.