Ultrasound is a machine that uses sound waves to transfer energy into your tissues. It can be used to help repair tissue after injuries such as a sprain, strain, bruising, tendinitis, or open wounds. It can help to decrease pain and muscle spasms, as well as help to break up scar tissue.

Another use of ultrasound is called "phonophoresis". This involves putting drugs, in the form of creams, onto the skin and the ultrasound will help the skin to absorb it.

The settings of the ultrasound vary depending on what goal is trying to be achieved.