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anneasquith, at first I thought i'd pulled a muscle and that it would clear itself in a few days, but after a week or so the pain, discomfort, was getting a little worse, then started getting numbness, tingling in the left arm/hand, so I looked it up online (I know you all say do NOT diagnose online), I just typed in, trapped nerve in shoulder shoulder and it came up with my symptoms. I have had sciatica a few times over the years along with usual pulls, aches and pains, this is not too bad, just bloody uncomfortable at night, even now while sitting and writing this its painful. I have decided to make an appointment with my GP, just didn't want to waste their time, thats all. Thanks everyone.