Pneumococcus generally refers to Streptococcus pneumoniae, which can lead to pneumonia in humans, and in severe cases, can be combined with related complications such as meningitis, pyothorax, or bacteremia. Streptococcus pneumoniae is a gram-stain-positive diplococcus, which is why it is also called S. pneumoniae. This bacterium can easily lead to lobar pneumonia, which can present with cough, rust-colored sputum, chills, high fever and other related manifestations, and when doing chest X-ray or chest CT, it can be found that there is a lobar solid shadow in the lungs. If Streptococcus pneumonia is treated in time, the disease may recover gradually and the prognosis is good. However, if the patient is weak or the treatment is not timely, there may be complications, such as meningitis, pyothorax, or bacteremia and other serious complications. Therefore, Streptococcus pneumoniae requires prompt medical attention and standardized treatment under the guidance of a doctor.