Can a Chemical Peel Cause a Cold Sore?

Hi there-
Yes, if you carry the virus that causes cold sores it is possible, but not certain, that you will develop them after having a chemical peel.
Make your Aesthetician aware of this concern and typically if the problem develops a prescription for an anti-viral medication can be prescribed for you.
If it seems that you develop them with each peel it is a good idea to take the anti-viral for 3 days- the day prior to your treatment, the day of and the day following. This can work to prevent the lesions from developing at all.
Not everyone will have this reaction however, even if they are prone to having cold sores

Any kind of chemical peel, e.g. salicylic acid, glycolic acid, or trichloroacetic acid (TCA) peel or laser resurfacing, should be performed under supervision of board-certified dermatologist or plastic surgeon. Prophylactic administration of antiviral medication such as acyclovir, valcyclovir or famciclovir is important, particularly for those with prior history of cold sores as the herpes virus can be scattered to the entire treated area and if not intervened appropriately, can lead to scarring, pigmentation.

Yes, it's possible to get a cold sore from chemical peels. If you have a recent history of cold sores and are considering a package of peels, you may want to get a prescription for a maintenance dose of acyclovir (or equal) from your practitioner.
Alternatively, it's possible to avoid the area immediately around the mouth to avoid causing a breakout.