I underwent laser therapy for improved skin clarity and reduction of minor acne scars. My dermatologist used the "Mosaic" laser and suggested 3 sessions spaced within a month. The 1st session went fine. After the 2nd session, the next day, the treatment points on 1 cheek became red and crusty. When the crusts fell off a week later, they revealed pink, atrophic scars. The worst thing is that the skin on my cheeks was fine. Now one cheek is ruined. What happened here? What can be done?