Causes of sternocleidomastoid Pain?

What is the sternocleidomastoid? Sternocleidomastoid muscle pain refers to discomfort or tension in the large, paired muscles running along the sides of the neck, connecting the skull to the collarbone and sternum. The sternocleidomastoid is located only beneath the skin rather than deep into the neck. The sternocleidomastoid aids in the head’s equilibrium and movement….