I undertook fraxel to address mild/moderate discoloration and texture issues with my middle aged skin. The procedure itself went as described by all the literature I read and the pre-procedure discussion I had with my clinician (I had the procedure at an MD's office). The clinician asked me casually when I was checking out if I was susceptible to cold sores, and I told her I hadn't had any since I was a teenager. She said not to worry in that case. All was okay post-procedure until about 48 hours after when a very large complex of cold sores emerged all around one side of my mouth. The doctor's office phoned in an acyclovir prescription and I've been using that and abreva obsessively. I wish I had known that cold sores are a common reaction to fraxel! I would never have undergone this expensive treatment only to return to the "teenage trauma" of walking around with painful, unsightly and embarrassing lip lesions.