Neck pain and tension are often the result of structural imbalances between the head and neck, due to issues related to the Brachial Plexus, tightness of the chest, and poor head/neck posture.
Many people complain that they feel an ache from the tops of their shoulders up into their neck. Shoulder muscles that shorten and become too tight or strong can cause spasms, cramps, and ache on a regular basis.
The pelvis is the keystone of the body and is the base for all movement and support for the upper body. The tilt of your pelvis in any direction beyond where it should be will have a strong reaction throughout the entire body.