A therapeutic ultrasound machine delivers sound waves to the tissues. A gel will be applied to your pet's fur so that the sound waves can reach the tissues. Some patients need to be shaved for the sound waves to reach affected tissues. Ultrasound has both thermal (warming) and non-thermal effects. Ultrasound helps to increase blood flow to the treated area and can also help to decrease swelling and edema. These effects can help provide pain relief. It can also be used to help with remodeling of scar tissue. Not to be confused with the diagnostic ultrasound used to visualize internal organs (or a growing fetus), therapeutic ultrasound can be used to treat conditions such as bicipital-tendonitis or trigger points within muscles.