It is usually the case that more than one treatment for acne scars is needed if the patient wants the best result. There are many factors which determine the final result including: What laser was used? How aggressive was the treatment? How deep were the scars? It is important to remember that the skin will only tolerate so much laser treatment before complications occur, but in practically every case multiple treatments are possible and cumulatve in their result. How many treatments is determined by how good the patient wishes to look.
The changes from CO2 and laser resurfacing continue to improve for several weeks to months after the procedure. However, with acne scars and large pores CO2 laser may need to be multiple times in order to optimize its effect. Acne scars are difficult to treat and sometimes this requires more aggressive laser treatment or combination treatments using dermabrasion and CO2 laser.