If the peripheral white blood cell count is normal or low, the neutrophils are low, and the lymphocytes are elevated, most fevers are caused by viral infections and can be treated symptomatically with antiviral drugs, such as ribavirin. If the peripheral white blood cell count is elevated and the neutrophils are elevated, most fevers are caused by bacterial infections and can be treated symptomatically with antibiotic drugs, such as penicillins, cephalosporins, macrolides and quinolones. If the fever is caused by cold, you can take oral anti-cold drugs such as Meguafen capsule, compound methamphetamine tablets and Benoxate dispersible tablets, which can treat and relieve various symptoms caused by cold, such as fever, headache, nasal congestion and sore throat. If the body temperature is greater than 38.5 degrees Celsius, you can use indomethacin suppositories in the anus, or take antipyretic and analgesic drugs such as ibuprofen and acetaminophen orally, which can play a fast role in reducing fever.