I did not have this treatment for acne but for visable thread veins on my cheeks and nose.
While after my 1st treatment I was left with bearable bruising, after the 2nd treatment I was left with serious rectangular burn marks all over my cheeks and scarring where blisters eventually healed within the borders of the rectangles. My face was also swollen for 4 days following the treatment.
The procedure was extremely painful at times and although I was in tears, the nurse operating the machine encouraged me to go on, and because she was a medical professional I trusted her. I guess the lesson is to listen to your body and if you think something is wrong speak up!! I was being physically burned but thought that I must just be over reacting to the pain.
I have paid £450 for 5 sessions of Isolaz which I will not now be completing and I doubt that I will be refunded any money. I really don't care about the money as much as I am distressed by the damage to my face which I fear is permanent (and ironically may only be salvagable with further laser treatment)
I know that this treatment works for some people and I would say that where my skin has not been burned (where a lower setting was used) the skin texture is improved and smoother. But due to my overall experience I would not recommend this treatment as the risks are, in my mind, too great.
If you are determined to have this, then please be aware that it is certainly not painless and if you feel severe pain during ask the nurse/doctor to stop before permanent damage is done.