Hello dear I appreciate your concern This could be due to throat infection may be due to bacteria or viral infection leading to tonsillitis Zpack is good antibiotics but that works only in presence of bacterial infection I would advise you to consult an ENT surgeon for examination and a battery of tests like CBC and throat swab for culture Do gargling with warm saline water or antiseptic mouthwash have lukewarm water to drink Avoid cold and icy substances. Have multivitamin supplements like vitamin C I hope you will find my response helpful and informative follow up questions are most welcome regards