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No CRPS is a nerve disorder. Crps is usually caused by an injury that the body doesn’t recover from or becomes more painful than what the original injury would cause.
Like if u stump your foot the nerve run to your brain and you feel the pain from stumping your toe. But something as well as the injury should heal and become less painful as days go on. In Crps the injury may start to see to be getting better but them continues to cause pain. The pain gets worse than what the injury caused from. Like swelling, temperature change, and severe pain.