Does Thermage Improve Acne Scarring?

Thermage gives overall tightening of the skin. The problem in acne scarring is not loose skin, but a depression in the skin. Fraxel is the name of one type of fractionated resurfacing laser, which is the best treatment for acne scars because it triggers the skin's healing mechanisms and can resurface the skin and smooth the scar. Non-ablative fractionated resurfacing can do this without any downtime, but you will need several treatments (exactly how many will depend on what your scars look like). Ablative fractional resurfacing will give you results in fewer treatments but will require one to two weeks of downtime.
Some acne scars can also be effectively treated with a little bit of filler (collagen or hyaluronic acid) injected into the scar. This raises the level of the scar so that it is even with the rest of the skin. This may be a good option if you only have a few scars, but the downside is that it is temporary and you will need to come in for treatment every few months.

Thermage uses radiofrequency to generate heat. This causes tightening of the collagen fibers of the skin but also stimulates generation of new collagen fibers. The result is skin tightening. Acne scars are permanent 'divots' in the skin.
I have had my best results using a Fraxel laser. This is a laser that is considered fractional therapy. It has replaced the carbon dioxide laser allowing patients to carry on with their personal and professional lives 24-36 hours after treatment. I have used the carbon dioxide laser which treats acne scarring very well but the associated downtime is the downside. I recommend 6 Fraxel treatments spread out 2 weeks apart. More treatment sessions are required since the energy of the laser is 'fractionated' versus all of the energy in one single treatment(carbon dioxide laser. After the each treatment, my aesthetician applies a special facial mask that decreases the reddness post treatment.