When recurrent fever caused by pharyngitis occurs, the first step is to treat the pharyngitis in order to relieve the symptoms of recurrent fever. There are many causes of pharyngitis, and the more common ones are viral and bacterial infections. In the case of viral infections, it is necessary to use the Four Seasons Anti-Viral Combination, or Pudilan Anti-Inflammatory Oral Solution for treatment. In the case of bacterial infection, antibiotics are needed to treat the infection. For upper respiratory tract infections, the more commonly used antibiotics are penicillins or cephalosporins, such as amoxicillin or amoxicillin clavulanic acid potassium, cefixime, and cefadroxil, which are effective. If there is a cephalosporin or penicillin allergy, these above drugs cannot be taken, and macrolide antibiotics such as roxithromycin or azithromycin are needed to treat pharyngitis. In addition, if the body temperature exceeds 38.5 degrees, you also need to take ibuprofen suspension to reduce fever.