Elevated neutrophils are associated with many infections and are generally common in bacterial infections, especially purulent cocci such as Staphylococcus aureus, hemolytic streptococcus , and Streptococcus pneumoniae will elevate neutrophils. Elevated neutrophils are mostly caused by bacterial infections, especially purulent infections caused by Staphylococcus aureus, Streptococcus haemolyticus, Streptococcus pneumoniae and other purulent cocci, which will release a large number of neutrophils from the bone marrow to play the role of immunity, resulting in an increase in the absolute value of neutrophils, which is usually accompanied by a sore throat, cough and other symptoms. There may be other reasons for elevated neutrophils, and the situation is more complicated due to different conditions, so it is recommended to go to the hospital in time.