Allodynia, meaning "other pain", is a painful (noxious) response to a usually non-painful (innocuous) stimulus and can be either static or mechanical. Allodynia differs from referred pain, but can occur in areas other than the one stimulated. It is dysesthetic. Allodynia is different from hyperalgesia, an extreme reaction to a stimulus which is normally painful.
Paula Abdul's story about her struggle with Reflex Sympathetic Dystrophy Syndrome (RSD), also known as Complex Regional Pain Syndrome (CRPS) highlights this complex and poorly understood disorder.
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