High frequency is used to treat a range of concerns from skin lesions, acne, waxing procedures and cold sores to fine lines, sagging skin and puffy eyes. Common areas of treatment include the face, neck and scalp but high frequency can be used on the entire body including the back. Unlock the remarkable results of high frequency skin therapy from the comfort of your home. High frequency skin therapy is a tried and tested method for treating various skin issues. Reduce Blackheads. Remove dark spots.