Ultrasound cavitation is a completely pain free treatment which involves applying a cavitation head which emits a high frequency sound waves to the area of the body being treated the head is lubricated using ultrasound gel to ensure a good contact is made with the skin allowing the wave to travel to the fat whilst the treatment is pain free there will be a faint tingling around the area being treated and you may also hear a high pitched sound as the sound waves travel through your skin zapp