Lobar pneumonia is an inflammation of the lungs caused primarily by Streptococcus pneumoniae. Lobar pneumonia is primarily an alveolar inflammation caused by Streptococcus pneumoniae, and rarely involves the alveolar walls or the interstitium of the bronchial walls. It is usually confined to one lobe or most of the lobes of the lungs, and occasionally occurs in several lobes at the same time, with the right upper lobe or the left lower lobe being the most common, and does not usually involve the bronchi. Lobar pneumonia is most common in adolescents and has an acute onset with chills, high fever, cough, and sputum, typically coughing up rust-colored sputum. The typical natural course of the disease can be divided into a congestive edema phase (1-2 days after onset), a red hepatoid phase (3-4 days after onset), a gray hepatoid phase (5-6 days after onset), and a dissolving and dissipating phase (7 days after onset). If lobar pneumonia is diagnosed, treatment should be standardized under the guidance of a doctor.