shoulder hurts and hand goes numb......could be carpal tunnel syndrome....some people get both symptoms......I started riding last year and had numbness much of the time......I notice that this year I am more relaxed and do not have a death grip on the handlebars and have cured my numbness.......I did add 4" risers and am aware of what is in my pockets, and change my position often.....on the other hand, if you get numbness and shoulder pain at any other times, I would suggest that you see a physician to make sure that there is nothing otherwise wrong!!