Trigger points in a number of muscles can refer pain into the head causing headaches. One of the most common muscles is the trapezius. This is a large diamond shaped muscle in the upper back and neck. Trigger points in the upper portion of this muscle are the most common trigger points in the body. These points will refer pain into the head, behind the ear and into the temple. Trigger points usually won’t resolve on their own, a therapeutic intervention is required to release the point.