In post #213 is a link to the National Institute of Neurological Disorders and Stroke.
In the NINDS CRPS summary is the following...
Although CRPS improves over time, eventually going away in most people, the severe or prolonged cases are profoundly disabling. Because of the varied symptoms, the fact that symptoms may change over time, and the difficulty finding a positive cause in some cases, CRPS is hard to treat. There is no treatment that rapidly cures CRPS
and...
The outcome of CRPS is highly variable:
- Most illnesses are mild and recover over months to a few years as the injured nerve regrows. If this doesn't happen, symptoms can linger to cause long-term disability.
- The outcome depends not only on the severity of the original injury, but also on underlying general and nerve health. Younger people, children, and teenagers almost always recover, as do older adults with good circulation and nutrition.
- Rarely, individuals may experience prolonged severe pain and disability despite treatment. This may indicate underlying separate problems interfering with healing requiring additional testing and treatment