Cold therapy is applied to soft tissues to aide in the reduction of inflammation due to an acute injury. Ice is used to constrict blood vessels, decrease blood flow and the inflammatory process to a new injury. Heat is applied to sub-acute or chronic conditions. Heat is used to dilate blood vessels and increase blood circulation to a specific area in the body. This aides in reducing pain by relaxing tight muscle tissue, which causes back aches, neck pain and headaches, TMJ, shoulder pain, and much more.