I have this problem with my arms and wonder if anyone have any idea what it could be. For example if I use my aerobic excerciser (which I can only do for a few minutes before I'm exhausted,,GEE!) my arms hurt really bad, likeif they were filled with acid, and after two minutes if I push it, they hurt from this so that they go limb. It started 3 years ago in my hands, but it has spread up into my arms all the way around to my shoulder blades. If I whisk gravy for 30 seconds the same thing happens, I get so weak and it hurts in that arm I hve to stop. It depends on what I do, i can hold my daughter without any problems, it's when my arm is doing repetative movement, and above a surten level of my body, seems like. It's like the musles are breaking, wasting, don't know what. Any experience or ideas anyone? I have not gotten diagnosed with FM or CFS as of yet, just have some bothersome problems! Hugs!