Tonsillitis Symptoms

Tonsillitis is an inflammation of the tonsils caused by an infection. In tonsillitis, the tonsils are enlarged, red, and often coated (either partly or entirely) by a substance that is yellow, gray, or white. Tonsillitis usually occurs as part of a pharyngitis (throat infection). Tonsillitis usually begins with sudden sore throat and painful swallowing.