Ultrasound is an acoustic wave with a frequency of more than 20 kHz, which causes mechanical, thermal and physicochemical reactions in body tissues. The action of ultrasound on the skin causes a micromassage effect, i.e. the movement of skin molecules, which results in an increase in the permeability of cell membranes and an improvement in cell metabolism. Ultrasound is used to combat wrinkles, cellulite, skin flabbiness, discolouration, scars and many other conditions.