There is no doubt that Fraxel Repair laser resurfacing can help the collagen improve its density, and the quality of the collagen may improve. This, theoretically, might help the healing of a facelift. There might even be better circulation after laser so that there is a richer oxygen supply to the healing dermis and epidermis after fraxel Repair laser. However, there is a rare risk of poor healing after carbon dioxide laser, and a very rare risk of scarring. Should a rhytidectomy (facelift) be done soon after carbon dioxide laser, this risk might increase and the scarring might incorrectly be attributed to the facelift. One should be careful if laser resurfacing with carbon dioxide laser is done after a face and neck lift. Neck skin doesn't heal as well as the facial skin and if the neck skin is brought above the jawbone and this treated by laser as if it were normal facial skin, the carbon dioxide laser might have a greater chance of scarring this tissue.
The information provided in Dr. Shelton's answer is for educational purposes only and is not intended to constitute medical advice. The information provided should not be relied upon as a substitute for consultations with a qualified health professional who may be familiar with your individual medical needs.