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.