Strange that this thread should rise now as I have been suffering the same kind of pain and have been considering seeing my GP. If I reach up suddenly with my right arm I get a pain in the shoulder the like of which I have never experienced...it lasts for several seconds and then is O.K again. I cannot put my right arm behind my back and reach upwards...which is how I usually wash my back and I can't put my right hand onto my left shoulder without some minor pain. Will see my GP first and then consider the more expensive option. Can't say I'm glad you are suffering the same LH but have sympathy with you.