Complex Regional Pain Syndrome (CRPS) typically causes severe, burning or throbbing pain, often out of proportion to the original injury, along with swelling, skin color changes (red, blue, or pale), temperature differences, sensitivity to touch, and changes in hair or nail growth. The affected limb may also become stiff or weak over time. Diagnosis is mainly clinical, based on symptoms and history, sometimes supported by imaging or nerve tests to rule out other conditions. Management includes pain medications, physical therapy, nerve blocks, and sometimes psychological support to improve function and reduce pain. You should seek medical attention early if symptoms persist, worsen, or spread, as prompt treatment improves outcomes and helps prevent long-term disability.