Ultrasound is a safe and effective method of stimulating the tissue beneath the skin’s surface using high frequency sound waves. Some conditions where therapeutic ultrasound is used are muscle spasms, chronic inflammation, restricted range of motion, and musculoskeletal pain. It can also be frequently used for wound healing. Ultrasound has both thermal and non-thermal effects. When it is used to warm the tissue it can decrease both muscle spasms and pain. Some non-thermal uses include wound healing.