Neutrophils are a subset of white blood cells that are elevated in blood tests, usually to indicate the presence of a bacterial infection in the body.
In most cases, high neutrophils are associated with an infection. Neutrophils are the main component of white blood cells, accounting for 50-70% of white blood cells. When the neutrophil ratio is elevated, accompanied by an elevated white blood cell count, and the patient also has fever, cough, sputum, abdominal pain, diarrhea, and local infection symptoms such as frequent and painful urination, the elevated neutrophil ratio is considered to be caused by an infection, often related to a bacterial infection.
