In case of elevated neutrophil ratio in blood test, C-reactive protein should be checked. If elevated C-reactive protein occurs, it means that the elevated neutrophil ratio is caused by bacterial infection, and antibiotics are needed for treatment at this time. If there is fever, but the fever is not very serious and the high neutrophil ratio is not very serious, you can take oral antibiotics, penicillin or amoxicillin clavulanic acid potassium if there is no allergy. If allergies exist, cephalosporin antibiotics, such as cefaclor or cefradine, can also be used. If allergies are also present, azithromycin may be used. If the fever is severe and the neutrophil ratio is high, it is best to treat this time with intravenous drip antibiotics, cefadroxil or cefoperazone if there is no allergy to cephalosporins.