A 65 years old female presents with constant, left-sided burning, stinging pain. The pain began following a fracture of her left wrist 6 years ago, at which point she developed a burning pain over the radial aspect of her wrist and shooting pains into her palm. Within days the pain had spread to the left side left leg, left foot, and groin. She is now in constant pain and barely uses her left arm. On examination, allodynia and hyperalgesia are present over the left side, most severe in the upper extremity. Pin, touch, vibratory, and proprioceptive sensations are decreased on the left side. There is dystonic posturing of the arm with contractures at the fingers, wrist, elbow, and shoulder. There is left-sided bluish discoloration below the mid-arm, shiny and swollen skin of the hand and fingers, and excessively thin nails. What potential sequelae do you need to be concerned about?