Red and blue light treatment is a non-invasive and painless therapy to treat acne scarring and remove scarring-type acne marks. Blue light can inhibit a variety of bacteria within acne, and also has a bioregulatory effect that balances oil secretion in the body, inhibits sebum breakdown, and prevents acne recurrence. Red light can accelerate the growth of new tissue cells on the traumatic surface, reduce the inflammatory response of acne, and alleviate exudation.