question: a week ago my 42 year old son suddenly experiened a pain in left shoulder blade and neck now through the week he has had tightness in his left chest where the heart is located and at the same time has pain in the left arm, neck and back shoulder and flank area of left back. No shortness of breath, sweating or nausea with this should he continue to think he has a pinched nerve or could it have something to do with his heart?