Red acne marks are usually due to the persistence of the inflammatory reaction after the acne subsides, it may also be due to acne inflammation for a long time, and there is a chronic inflammatory reaction of the skin tissues on the surface of the acne, so if you want to deal with it at this time, as far as possible, you can use red and blue light irradiation for effective improvement. Usually you can use red and blue light, mainly based on the principle, red light penetration heat effect by promoting inflammation absorption, and blue light secretion, promote tissue secretion of collagen, effective repair of acne marks red.