In general, pneumonia can be cured and discharged after 7-10 days of hospitalization. The length of hospitalization for pneumonia is related to the severity of the disease, the patient’s age, physical resistance and other factors, and there are large individual differences. For example, acute pneumonia in young patients with no underlying disease requires appropriate treatment for bacterial and viral infections and other causative factors, and is usually cured in 7-10 days. Pneumonia caused by fungal infections is more difficult to treat and requires standardized antifungal treatment for 1-2 months to heal. Caseous pneumonia due to tuberculosis infection can take more than 6-9 months to heal. Pneumonia occurring in elderly patients with multiple underlying diseases is more difficult to treat and can take 2-4 weeks or even longer. Patients are advised to take regular rest, pay attention to warmth, increase and decrease clothing in a timely manner, and pay attention to physical exercise, which can effectively prevent pneumonia.