Hi Dee: I've had Fibro since 96 and RSD/CRPS since 98. Both took 2 yrs to diagnose. FMS, as Lisa explained, is an all-over body pain...even touching your skin, almost anywhere hurts, along with deep muscle throbbing and stabbing pain in hips, shoulders, you name it, accompanied by fatigue. RSD starts in one part of the body that has been injuried, often minimally injured. It is progressive, & over time can spread to other body parts. It usually manifests in extremities: hands and/or feet. It is a burning pain. RSD is extremely complex, and many other symptoms appear that, until I educated myself thru internet research, I never attributed to the RSD. A great website w/valuable info is rsddx.com. The physician that runs the site has studied RSD for 30 yrs, and it helped me a great deal. It is important that you find a pain specialist, and do research because a good pain doc is hard to find. Good luck and write if you have more questions.