As a therapeutic modality, ultrasound uses high-frequency sound waves to deliver deep heat to treated tissues. There are two major benefits to this therapy. First, the use of ultrasound promotes increased blood flow, as tissue is heated to 40 to 45 degrees Celsius. The thermal effects from the energy produced by the sound waves speed healing and reduce inflammation. The second common application of therapeutic ultrasound is a cavitational effect that results from the vibrating of tissue. The vibration seems to stimulate cell membranes which encourage repairing effects of cells in inflamed areas.

Ultrasound is administered gently with a handheld soundhead, using strokes or circles over the affected area. The micro-massage that ultrasound creates can help reduce swelling, increase blood flow, and decrease pain, stiffness, and spasms, making it a viable therapy for numerous applications.