A small amount of interstitial hyperplasia in the lower lobe of the left lung can be left untreated if there are no symptoms, and regular checkups are enough; if the patient’s symptoms are obvious, he can take anti-infective drugs or symptomatic drugs as prescribed by the doctor. A small amount of interstitial hyperplasia in the lower lobe of the left lung may be caused by interstitial pneumonia, bronchitis, obstructive pulmonary disease, etc. The patient needs to be examined for cardiovascular and cerebrovascular diseases or respiratory system abnormalities. If there is no abnormality, patients should pay attention to the review, no treatment is needed. If the patient has symptoms of respiratory system infection, the patient can take roxithromycin, azithromycin, cefuroxime tablets and other drugs under the guidance of the doctor. If accompanied by cough symptoms, patients can take dextromethorphan tablets, codeine tablets, etc. to stop cough treatment. When there is a lot of sputum, drugs such as acetyltranexamic acid can be taken to promote the expulsion of sputum. When there is a little interstitial hyperplasia in the lower lobe of the left lung, patients need to pay attention to cold protection and warmth to avoid infection, and it is recommended to go to the hospital in time and follow the doctor’s instructions for treatment.