Acne scars can cause red or brown discoloration and uneven skin contour. Usually multiple types of treatments are needed for maximum improvement. Patience is key since the full effect is often not seen for several months. Laser resurfacing of the skin stimulates the collagen production. This thickens the skin and shrinks the surface area of the scar, and color may be improved as well. The Cross technique uses a very concentrated TCA peel. There are multiple types of laser as well, and the best choice depends on the degree of improvement needed as well as your skin color.