The gray hepatomegaly phase of lobar pneumonia appears mainly on day 5-6 of the disease, when the surface of the lungs is significantly swollen and the lobes are also swollen, and at this time the congestion gradually subsides and the red color changes to gray, hence the name gray hepatomegaly. The pathological changes are mainly fibrin exudation and a large infiltration of neutrophils. Lobar pneumonia is self-limiting and is caused by Streptococcus pneumoniae infection, so it is not very difficult to treat. First, symptomatic treatment is needed, and then anti-inflammatory treatment with antibiotics is required. In general, fever in lobar pneumonia is more serious and often results in high fever, which requires oral ibuprofen suspension and acetaminophen suspension for antipyretic treatment, combined with physical cooling for better results. If there is no penicillin allergy, intravenous penicillin drip can be used for anti-inflammatory treatment.