Therapeutic ultrasound is often confused with diagnostic ultrasound (visualizing the fetus in pregnant mothers). Therapeutic ultrasound creates sound waves (outside of our range of hearing) and directs them into your body.
These waves can go as deep as 3-4 inches into your body. At that depth, the waves are absorbed and produce heat which allows deep muscles and ligaments to relax. Ultimately, ultrasound speeds up the rate of healing and can be used for a wide range of injuries.