LED skin treatment is a painless, non-invasive skin treatment that uses an array of bright light-emitting diodes to stimulate collagen production. The LED handpiece is gently moved across the areas to be treated and it emits low-level light energy into the deeper layers of the skin. Red light LED stimulates cellular activity, including the fibroblasts that produce collagen. Blue light LED kills bacteria that lives below the surface of the skin and is responsible for acne.