Carboxytherapy, also called carbon dioxide therapy, is a simple non-surgical cosmetic medicine treatment aiming at reducing the appearance of scars, cellulite of all grades, wrinkles and stretch marks. It uses a tiny needle to inject carbon dioxide beneath the skin's surface. This technique, used for face, neck and breast lifting, also decreases dark circles around the eyes while increasing collagen formation in the skin, giving it a more youthful appearance.