A, the role of 1, cellular energy supply increased: red light medical instrument emitted red light maximum absorber is mitochondria, in order to make the mitochondria of the peroxidase activity increased, resulting in increased ATP production; experimental evidence that the red battery wave can make Hela cells ATP increased by 190%. 2, scavenging free radicals: red light emitted by the red medical instrument can make the superoxide dismutase (SOD) activity significantly enhanced, which helps to eliminate free radicals in the patient’s body and avoid lipid peroxidation and other effects of damage, which is beneficial to disease treatment. 3, promote wound healing: red light medical instrument emitted red light to promote the proliferation of fibroblasts and intradermal cells, increase cell metabolism, promote cell synthesis, thereby accelerating wound healing. 4.Increased oxygen carrying capacity of blood: The red light emitted by the red light medical instrument can improve the combination capacity of blood and oxygen, so that the oxygen carrying capacity of blood is significantly increased (by 7.6%). 5.Improve the human microcirculatory disorder: red light emitted by the red light medical instrument can improve the human microcirculatory system by increasing the deformability and mobility of red blood cells. Second, the scope of treatment Indications: hepatic itching, chronic cryptitis, anal fissure, mixed hemorrhoids, anal fistula, necrotizing fasciitis and other post-anal surgery trauma, poor healing of surgical wounds, etc. have a better effect, and have anti-inflammatory and analgesic effects.