I have been experiencing pain in my arms. It started near my right shoulder and has spread to my left upper arm area. It isn t constant, but when I make certain movements (such as trying to reach back to unhook a bra!), the pain stops me before I can reach up my back to even get close to the area. Reaching to get something off of a high shelf is very painful, more so on the right than the left. The pain started several weeks ago and does not seem to be getting any better. Strangely, I can swing a golf club with no pain, and most other movements cause no pain. I thought it was just a muscle strain (it does not seem to be aggravated by bone movement, i.e. shoulder rotation), but I became concerned when it moved to the left upper arm. Can you help me with what this might be? Thank you, Teresa