The difference between pneumonia and lung infection can be distinguished according to the cause of the disease, treatment modalities and other aspects. 1. Causes: The causes of pneumonia are more complicated, usually due to infection, chemical stimulation, radioactive damage, foreign body inhalation, etc. However, the causes of lung infection are more single, usually due to inflammation caused by infectious factors. 2. Treatment: Pneumonia due to infection, mainly anti-infective drugs; if the pneumonia is not due to infection, it is usually detached from harmful substances and the environment, treatment of the primary disease, hormonal anti-inflammatory and antifibrotic drugs such as nidazanib. Lung infections are usually anti-infective treatment such as cephalosporins, quinolones. The specific situation also need patients to go to the hospital for the appropriate examination, and then make a judgment, to avoid blindly using drugs, so as not to cause the aggravation of the condition.