Since no UV light is emitted, there is no risk of sunburn or skin cancer. This treatment has no adverse reactions and no down-time. The FDA classifies LED devices as possessing “non-significant risk”; they are completely safe and possess no possibility of harm from over-exposure. We recommend speaking to your doctor first if you have any skin conditions, you are pregnant, have epilepsy or photoallergy or are taking any medications that causes light sensitivity. Our mask comes with eye protection seals so that the eyes are not exposed to the light during treatment.