Sometimes i get a throbbing/shooting pain down the right side of my neck to my shoulder. i'm just wondering what would cause it. ?

Cervical spine pain: The differential diagnosis would include cervical facet syndrome (arthritis), cervical radiculopathy (pinched nerve), or myofascial pain (muscle spasm). An evaluation with a physiatrist, pain physician, or orthopedist is suggested with detailed physical exam of cervical spine and right shoulder joint, followed by appropriate diagnostic imaging if indicated (i.e. MRI cervical spine and/or shoulder)