Nowadays, a person’s body image is an important issue that affects cognitive function, and mental and physical health. Today, people seek to improve their body contours and reduce body fat through non-invasive, safe, painless, and comfortable solutions. These conditions have led to the rapid development of non-invasive devices that use the technology of ultrasound and help to immediately and effectively improve body image. In this article, two technologies are based on ultrasound. The first is cavitation, and the second is shock wave ultrasound that will be presented, their characteristics will be developed and they will be compared in terms of their effectiveness and their advantages among the currently available research data.