Tonsillitis is an inflammation of the palatine tonsils caused commonly by Group A Streptococcus bacteria. Symptoms include sore throat, fever, enlarged tonsils, and difficulty swallowing. Diagnosis involves physical examination and rapid strep tests. Treatment involves antibiotics, pain medication, fluids, and sometimes tonsillectomy for recurrent cases. Nurses manage tonsillitis by promoting airway clearance, maintaining fluid volume, and relieving pain. Complications can include peritonsillar abscess. Prevention involves hand washing and avoiding sharing utensils.