Higher Occurence of Cold Sores After Lip Injections?

Hello SLK.  The answer to your question is yes, we have seen this type of reaction previously.  More often than not, it is after the more traumatic procedures such as laser resurfacing, but any trauma around the lips can bring on a cold sore as well.  The onset of the cold sore may be quite some time after the actual procedure and during the healing process.

If this is a recurring issue in the months after treatment, ask your practitioner for a prescription to head off the problem before you come in for your treatment.  Good luck.

Cold sores can be triggered by any sort of stress, physical or emotional. The introduction of a needle into the lip, as during a filler injection, is one such stressor. The concern for cold sores is usually immediately after the treatment. For this reason, I recommend that anyone with a history of cold sores start an antiviral prophylactically prior to lip injections. 

If you have a history of cold sores on the lips (herpes labialis), then it's a good idea to have your doctor prescribe an anti-viral drug like valcyclovir to be taken around the time of your lip injection.
I doubt you're more likely to get flare-ups after the initial injection, as I have not seen this as a common occurrence in my patients.
Best regards.

Dear SLK350:

As you are aware your cold sores  on your lips (herpes labialis) are triggered by the trauma (although mild) to your lip.  I would recommend informing your physician of this recurrence such that recurrence is minimized with pre-treatment use of valtrex.  Best wishes.

Any stress such as lip injections to the mouth area could cause a cold sore flare up. You are more likely to experience this soon after the procedure. To prevent this from happening you may be prescribed anti-viral medication before the injection. The months following your injections should not cause an increase in cold sore flare-ups.