Herpangina is a viral infection primarily caused by enteroviruses, particularly coxsackieviruses. It typically affects young children and is characterized by fever, sore throat, and the presence of small, painful blisters or ulcers in the back of the mouth and throat. The illness is usually self-limiting, resolving within a week, but supportive care may be necessary to alleviate symptoms. Good hygiene practices can help prevent its spread.