Tonsillitis is an infection of the tonsils . It can result in inflammation, which causes a sore throat, difficulty swallowing, and pus-filled spots on the tonsils . Learn more here. The classic presentation of tonsillitis includes sudden onset of fever and sore throat with inflammation of the tonsils . Children are most commonly affected during their school-going years. Other risk factors include family history, cold weather, diabetes, and air pollution. Tonsillitis is a condition that causes inflammation and irritation of the tonsils , often due to viral or bacterial infections. Learn about the common signs of tonsillitis, such as sore throat, fever, and white spots on the tonsils , and the best ways to treat it, including medications and tonsillectomy. The main symptoms of tonsillitis are inflamed and swollen tonsils , sometimes severe enough to make it hard to breathe through your mouth. Other symptoms include: In children, tonsillitis ...