Small, glassy nodules in the upper lobe of the left lung are referred to as pulmonary nodules, and can be treated with medication, surgery, and improvement of daily life routines. 1. Drug treatment: Generally, antibiotics can be used for treatment if the nodules are caused by lung infections and are small with no other complications. If it is caused by pneumonia, commonly used antibiotics are cephalosporin and penicillin; if it is caused by tuberculosis, commonly used drugs are streptomycin, rifampicin, isoniazid, etc., and it can be combined with nebulized inhalation to achieve a better therapeutic effect. The specific use of drugs should follow the doctor’s instructions. 2. Surgery: If the lung nodules are benign, surgery can be decided according to the size of the nodules and the symptoms; if the nodules are malignant space-occupying lesions, surgical resection should be considered. Avoid spreading or metastasis of the lesions. 3. Improve the routine of daily life: patients with glass density nodules in the upper lobe of the left lung should quit smoking, eat a light diet, and take more rest to avoid overwork. Pay attention to keep warm and avoid respiratory diseases. The appearance of the left upper lobe of the lung glass density nodules, should go to the regular hospital for medical treatment in a timely manner, according to the patient’s condition to follow the doctor’s instructions for symptomatic treatment.