Is tonsillitis's a systemic infection or localized?

Tonsillitis is primarily considered a localized infection, as it specifically affects the tonsils in the throat. However, it can have systemic effects, such as fever and malaise, if the infection spreads or if the body responds to the localized infection. The causative agents are often viral or bacterial, and while the primary site of infection is localized, the body's overall response can lead to systemic symptoms.