The part of the muscle tissue that facilitates actual contraction is a microscopic unit, that is called sarcomere. In the muscles, contraction of millions of sarcomeres is needed to perform even the smallest of movements. A trigger point exists when the sarcomeres are chemically no longer able to de-contract. A triggerpoint can cause pain. This pain can focus on the location of the triggerpoint itself, but can also radiate to other areas of the body. By deactivating the triggerpoint, jammed sacromeres can be loosened.