Tonsillitis is an infection of the tonsils. Tonsils are lumps of tissue on both sides of the back of the throat that help the immune system protect the body from infections. Inflamed tonsils get red and swollen and can cause a sore throat.
Inflamed tonsils look red and swollen, and may be covered with a yellow or whitish coating or spots. A child with tonsillitis may have:
