http://www.rsdalert.co.uk/FAQ/howcanirecognise.htm
" RSD (Reflex Sympathetic Dystrophy) can start in many ways, the triggering factor could be anything from a twisted ankle or stubbed toe to a broken bone or major surgery. " There is often swelling, skin rashes/blistering, stiffness of joints, uncomfortable temperature changes of the affected area, extreme sensitivity whereby even slight touch means unbearable added pain, nausea, vomiting, lack of sleep, inability to concentrate or remember and a sense of confusion. This is on top of the intense pain. Patients will describe the pain as: burning, hot, stabbing, shooting - others will describe the feelings as aching, tightness, numbness, and tingling sensations."