When imaging is done, if the findings reveal solid changes in the middle lobe of the right lung, it is mainly considered to be caused by lobar pneumonia, also called Streptococcus pneumoniae pneumonia, which is an acute lung infection with a lobar distribution caused by S. pneumoniae infection. It is an acute, time-varying inflammation caused by S. pneumoniae infection mainly after exposure to cold, exertion, or rain, causing sudden chills, high fever, cough, chest pain, and coughing up rust-like sputum, and may also cause nausea, vomiting, abdominal pain, diarrhea, and other symptoms. If not treated in time in severe cases, it may also cause infectious shock, which requires active treatment with penicillin or cephalosporin antibacterial drugs, as well as various symptomatic and supportive treatments.