Chronic tonsillitis generally does not cause fever, but if chronic tonsillitis has an acute attack, it may cause fever. This situation is mainly due to an acute bacterial infection, with common symptoms including sudden sore throat, swollen tonsils, and pus formation, which may be accompanied by fever. Generally, the duration of the fever varies from person to person, typically around 3 days. During the acute episode, timely medicinal treatment should be considered, primarily with antibiotics. If the body temperature exceeds 38.5 degrees Celsius, fever-reducing medications should be considered. It is also necessary to monitor the patient's blood routine and temperature fluctuations, with regular check-ups.