Fraxel Failed to Work on my Acne Scars

Here's the deal with acne scars: no laser is really going to do all that much for them. Sorry, but acne scars are very difficult to treat and you are never going to go back to where you want with any laser alone. Even with the best of treatments, you are going to have about 50% improvement and that is with fillers such as restylane and perlane, which will be doing the heavy lifting.
Prior to having Fraxel, Cool Touch, Fraxel Re:pair and every other laser that has promised to improve acne scars but didn't, I performed full face CO2 lasers on patients with acne scars. The results were not all that impressive, despite the fact that patients went through 2 weeks of sheer torture during the recovery phase. That, on top of the price in the $4000 range that made it *seem* like something ought to have happened. Due to this fact, I stopped doing the older, CO2 laser and haven't missed it one bit.
Now, unfortunately, we have a whole new generation of doctors and quasi cosmetic surgeons (family practitioners, nurse practitioners, Ob Gyns, etc) who have now purchased these lasers for their medispas and are trying to generate some cash, along with laser companies that are desperate to sell their machines. So, the old concept of treating acne scars with a laser such as Fraxel is once again being trotted out and desperate patients are being duped once more.
The truth is that it does precious little for acne scars and typically not enough to make someone spend the money and recovery time to do the treatment. What I tell patients is that if the money is something that you care about and it is anywhere near a stretch to do the procedure, you don't want to do it for acne scars. Wrinkles are a whole different situation because it does work for these. Acne scars not so much. And the recovery time, if the scars are done correctly with it, is going to be about a week or two along with major downtime and oozing. So, think twice before doing this procedure, despite what the laser companies and many doctors are telling you!

Thank you for the question. 
There are several different Fraxel lasers on the market.

Fraxel re: fine™: Fractional, non-ablative treatment which delivers a gentle yet effective option for skin rejuvenation and resurfacing. 
Fraxel re: store™: (The main or flagship Fraxel system). Fractional, non-ablative treatment for skin resurfacing and rejuvenation. 
Fraxel re: pair®: Fractional, ablative treatment using a CO2 laser is an aggressive treatment for moderate to severe photodamage.
These are very different lasers which different results and different recoveries.  Please see a board certified laser expert to discuss the best laser for you.  Also, note that acne treatment should be multimodal for best results.  A combination of resurfacing lasers (Fraxel or Lumenis Ultrapulse), PRP, microneedling, subcision, filler, chemical peel, and surgery may be needed for optimal improvement. Multiple treatments are generally needed to give the best possible cosmetic result.

As a patient, it can be really hard to figure out which of the treatments that are recommended at medical spas will actually work. The questions to ask yourself:Does this clinic have a range of options available to choose from, or are they recommending what they have (lasers are expensive)?Did the treatment provider set my expectations properly about what improvement can be achieved? The fact that you expected your scars to "disappear" indicates that perhaps you were not well consulted.Acne scars are very hard to treat. An improvement (but not perfection) can be expected with certain laser technologies.