Elevated neutrophil ratio and C-reactive protein may be caused by bacterial infections, or may be the result of tissue necrosis, rheumatic immune diseases, etc. Neutrophils are a classification of white blood cells, and the normal reference proportion is 50-70% of white blood cells. Elevated levels are associated with bacterial infections, hemorrhage due to trauma, etc., tissue necrosis due to myocardial infarction, trauma, etc., rheumatic immune disorders, and advanced malignant tumors. C-reactive protein belongs to the acute phase reactive protein, which is commonly found in inflammation, trauma, post-surgery, myocardial infarction, malignant tumors, rheumatoid immune diseases in the active stage, and so on. Clinically, neutrophils and C-reactive protein are elevated at the same time, which is most common in bacterial infections, but it can be seen that both of them can be elevated in trauma, tissue necrosis and other cases. It is recommended to consult a doctor for standardized diagnosis and treatment when necessary.