Hi sir, I am private sector employee and i work in long hours.immidiatly after starting wrk for 2hrs i get so much pain in my upper back..that is inbetween sholder. Due to this i am not able to work properly and after doing few stretches it will go and again it will start.. I sit in a good company chair and please suggest a good back rest pillow or any other remidies by which i can avoid the upper back pain Many thanks