MedicineNet appreciates your comment. Your comment may be displayed on the site and will always be published anonymously.
What are the signs and symptoms of cold sores?
The hallmark symptom of herpes is a group of blisters on a red base. These blisters dry up rapidly and leave scabs that last anywhere from a few days to a few weeks, depending on the severity of the infection. This pattern has important implications for the many people who fear they have herpes but don't: If something lasts for weeks, it is unlikely to be herpes.
Herpes infections feel dry and crusty, and they sometimes itch. Some patients have a "prodrome," which is the occurrence of certain symptoms before the actual sores become fully evident. The prodrome to herpes infections typically involves a burning or tingling sensation that precedes the appearance of blisters by a few hours or a day or two.