Bacterial Acne comes from the papillary and reticular layers of the skin. It’s also where hair follicles and sweat glands are formed. Acne is caused when oil and dead skin cells get become trapped in these follicles and bacteria forms, resulting in pimples. Blue light therapy kills p-acne (the acne causing bacteria) and shrinks the oil glands, decreasing and eliminating pimples and acne. The Touch Activated LED Mask by SevenSkin Beauty is most effective on mild to moderate acne.