Acne or acne vulgaris, as it is medically known, involves the oil glands at the base of hair follicles. Although acne most commonly occurs during puberty, adults may also have them. There are four main causes of acne and they are clogged pores, bacteria, dead skin cells and oil production. Acne typically appears on the face, neck, back, chest and shoulders. LED light Therapy Device, Crystalite can make acne lesion.And if you want to reduce the acne scar, please check our Micro Beam Fractional CO2 Laser Device, eBeam. And the soft laser (also named Charcoal Laser Facial ) with our Q-Switched Nd:YAG Laser with Long Pulsed Light can also used for active acne lesion.