Skin type is a fundamental effecting factor in this treatment as due to the high level of pigment in the skin. Tolerance of pain is very individual from person to person and machine to machine. We have a variety of machines including no pain machines and the sensation of each are completely different. No anesthetics are required, and most people describe the sensation as similar to that of a rubber band snapping onto the skin. You may find it comforting to cool the skin after the treatment.