Left lung in the middle and lower lung field with punctate increased density shadow of different causes, the treatment is not the same, caused by increased density shadow of the lung can be inflammatory, tuberculosis, fungal infections and tumors caused by lung disease increased density shadow of the lung, inflammatory patients need to carry out anti-infective treatment, tuberculosis patients need to carry out anti-tuberculosis treatment, tumors patients need surgical treatment. 1. Inflammatory lung diseases: if the infection of bacteria or fungi can cause increased density of the lungs, you need to follow the doctor’s instructions to choose ceftriaxone, azithromycin and other anti-infective treatment, if the fungal infection caused by increased density of the lungs, choose fluconazole for antifungal treatment. 2. Tuberculosis disease: patients infected with tuberculosis caused by increased density of the lungs, need to follow the doctor’s instructions to carry out anti-tuberculosis treatment, you can choose rifampicin, isoniazid drugs for anti-tuberculosis treatment. 3. Tumor lung disease: for example, lung cancer, causing increased density of lungs, early patients need to undergo surgical resection of lung cancer treatment. If the patients have any discomfort, they should go to the hospital in time and should not be careless so as not to delay the treatment.