I'm not exactly sure what you mean by sores. You should contact your physician as soon as possible though.

Chemical peels and laser resurfacing can cause a herpes flare up. (~50% of teenagers have been exposed to HSV-1 and 80% of adults have been exposed to HSV-1).

The herpes virus lies latent or dormant in our nerve endings. More often than not it does not spread and does not flare up. So, even if you've never had a herpes flare, you may still have been exposed to the virus.

Peels injure the skin and can lead to a flare up, i.e. a herpes outbreak. This is something that can be treated medically, but should be done so quickly.