an enanthemous (mucous membrane) disease characterized by a painful vesicular eruption of the oral mucosa associated with fever, sore throat, and pain on swallowing

Herpangina (from herp, an itching, and angina, a sore throat, literally "a choking"; also called mouth blisters) is the name of a painful mouth infection caused by coxsackieviruses. Usually, herpangina is produced by one particular strain of coxsackievirus A, but it can also be caused by coxsackievirus B or echoviruses. It is most common in children.