This is one of the better questions posed on Real Self since I have been a member. It is pretty axiomatic that cold sores (herpes labialis) may occur following filler injections in this area. This probably has something to do with the activation of the nerve in which the virus has set up its home.
Whether a procedure on or around the lips results in herpes activation months following such treatment is unknown, as far as I could ascertain. This might be a good area to research. Perhaps, one of the other contributors to Real Self could guide us to an article answering your question. I can't.



