Within a day or two, small blisters develop. A small area of redness surrounds them. An individual can have 2 or 3 of these blisters, or up to 30 or more. Blisters located outside the mouth generally do not cause itching or pain. The disease is usually mild and lasts only a few days to a week.
Most blisters disappear without ulcerating or cracking.
If the mouth is sore, avoid eating or drinking citrus and salty or spicy foods. Children and teenagers should not take aspirin, as aspirin use in these age groups has been associated with a rare and serious brain and liver disorder called Reye's Syndrome. It can be confused with chickenpox. All Rights Reserved.