Complex Regional Pain Syndrome, also known as reflex sympathetic dystrophy, is related to reflex sympathetic dystrophy and causalgia, and has symptoms including back pain, headache and neuralgia. An important gene associated with Complex Regional Pain Syndrome is CALCA (Calcitonin Related Polypeptide Alpha), and among its related pathways/superpathways are Signal Transduction and NF-KappaB Family Pathway. The drugs Triamcinolone and Gabapentin have been mentioned in the context of this disorder. Affiliated tissues include skin and dorsal root ganglion, and related phenotypes are limb pain and dry skin