Therapeutic ultrasound is used to relax muscles around a joint in order to allow a chiropractor to produce effective manipulation to that joint. Deep, painless heat beneath the skin encourages blood circulation to the area to relax the muscles. This speeds the healing process through the sound waves produced by the energy output from the ultrasound head. Ultrasound is heated up to between 104 - 113 degrees fahrenheit to increase blood flow to an area and decrease inflammation. The vibration from the ultrasound stimulates cell membranes to repair the cells within inflamed areas. Ultrasound can help reduce swelling, decrease pain and stiffness, while massaging muscles, making it a useful tool in a chiropractor’s toolbox.