A blister on the throat is considered a possible case of herpes pharyngitis, which is caused by a coxsackie A virus infection and often develops in children, but can also occur in adults when their resistance decreases. The disease often presents clinically with fever, a sore throat, and an examination that reveals a red papule in the throat, which causes severe pain in the throat. In terms of treatment, herpes pharyngitis is self-healing and can resolve on its own even without medication. However, if the pain is significant and accompanied by fever, oral antiviral medications such as ribavirin can be taken. A light diet with easily digestible, soft foods is also recommended.