Herpetic stomatitis is a contagious viral illness caused by Herpes virus hominis (also herpes simplex virus, HSV) and is seen more often in young children. This condition probably represents their first exposure to herpes virus and can result in a systemic illness characterized by high fever (often as high as 104 degrees Fahrenheit), blisters, ulcers in the mouth, and inflammation of the gums.

The inside of the cheeks and tongue frequently develop ulcers 1 to 5 millimeters in diameter with a grayish-white base and a reddish perimeter. These ulcers are very painful and cause drooling, difficulty swallowing, and decrease in food intake (although the patient may be hungry).

An adult member of the family may have a cold sore at the time the child develops the herpetic stomatitis or, more likely, no source for the infection will be discovered. The illness clears up and ulcers are generally healed within 10 days.

• Fever, may precede appearance of blisters and ulcers by 1 or 2 days
• Irritability
• Blisters in the mouth, often on the tongue or cheeks
• Ulcers in the mouth, often on the tongue or cheeks -- these form after the blister pops
• Swollen gums
• Pain in mouth
• Drooling
• Difficulty swallowing (dysphagia)

Herpetic stomatitis can be treated with the acyclovir family of antiviral medications.

A mostly liquid diet consisting of cool to cold, nonacidic drinks should be provided while the child's mouth is very sore.

An oral topical anesthetic (viscous lidocaine) is available for severe pain, but it must be used with care as it masks all sensation and may interfere with swallowing and allow the child to burn himself on hot liquids without knowing it. In addition, a few rare deaths have been reported from overdosage and misuse of lidocaine.