Inflammation of the lower lobe of the left lung can be returned to normal after standardized treatment based on a comprehensive assessment of general condition, clinical symptoms, imaging tests, and blood analysis. Treatment includes general treatment, drug treatment and symptomatic supportive treatment. 1. Treatment methods (1) General treatment: give oxygen by mask, turn over and pat the back regularly to promote the discharge of secretions. (2) Drug therapy: use antibacterial drugs such as cefotaxime sodium, azithromycin and other anti-infective, severe infections can be short-term use of glucocorticosteroids such as dexamethasone, prednisone and so on. (3) Symptomatic supportive treatment: pay attention to reasonable diet, ensure nutritional supply, keep breathing fluent, maintain water-electrolyte balance. Regularly review the blood routine and observe the changes of the condition. 2. After the above treatment, the following indicators can be used to comprehensively assess the recovery situation. (1) General condition: the patient’s body temperature returns to normal for three consecutive days, vital signs are stable, and his spirit, physical strength and appetite have improved significantly. (2) Clinical symptoms: respiratory symptoms such as cough, sputum and wheezing basically disappeared. (3) Imaging examination: chest fluoroscopy, X-ray or chest CT suggests that the lung infection foci have completely disappeared. (4) Blood analysis: blood leukocytes return to normal after being elevated, and inflammatory indicators such as C-reactive protein also return to normal. Whether the inflammation in the lower lobe of the left lung returns to normal should be judged by the doctor according to the above situation of the patient. The above medications should be used reasonably under the guidance of the doctor, avoid self-medication.