What could be causing the pain and burning sensation in my arms and neck?

In 2006 I started to feel a painful, burning sensation in the base of my neck, it would then travel across to both arms and down to my hands. When it reached my hands they would hurt. Along with the burning sensations I felt weak and it was like I couldn't breathe. I discoveered if I went outside or washed my face with cold water the pain & Burning sensation subsided then went away all together. I've been to several clinics and neither were able to pinpoint the cause or give me an answer.