This document discusses tonsillitis, including what it is, causes, symptoms, diagnosis, treatment, and prevention. Tonsillitis is an infection of the tonsils caused by viruses or bacteria. It is commonly diagnosed in children and causes a sore throat and fever. Diagnosis involves examination of the throat. Treatment depends on the cause but may include antibiotics, surgery to remove the tonsils, or home remedies like salt water gargles. Left untreated, tonsillitis can lead to complications, but with treatment symptoms usually resolve within a week. Preventing spread requires hand washing and avoiding contact with infected individuals.