C-reactive protein is an important indicator for monitoring clinical bacterial infections, which can be significantly increased if bacterial infections occur. Pneumonia is an infectious disease of the lung. If lobar pneumonia occurs, with an increased total white blood cell count, cough and sputum, accompanied by fever and chest pain, C-reactive protein tends to be significantly increased, which mostly indicates bacterial infection and requires aggressive anti-infective treatment. High C-reactive protein is an indicator of a broad spectrum of bacterial infections throughout the body, and if there is an increase in C-reactive protein in pneumonia, it indicates a serious bacterial infection and requires If a high C-reactive protein value is present in pneumonia, it indicates a serious bacterial infection and requires early anti-infective treatment. Therefore, an increase in C-reactive protein can indicate a bacterial infection, and early anti-infective treatment is needed if it is caused by pneumonia.