I keep having cold sensations throughout my body, it's intermittent but very shocking when I experience it. I get pain in my neck, shoulder, and back. I've been checked out in the past few months by ER physicians by having a CAT scan on my head, and xray of cervical spine, which showed no abnormalities. I have also although unrelated had chest xrays, and several ekg's and blood panels which also showed no abnormalities. The doctors I talked to mentioned that it could be caused from poor posture and perhaps nerve compression or injury but I either way I haven't been able to fully figure it out. I also have tmj pain which I have been told could be related to the poor posture. I'm a 24 year old male with no history of major medical problems. Please help I'm really freaking out. I Appreciate any response!