CRPS (complex regional pain syndrome) varies widely in duration. Many people see significant improvement within 6 to 13 months of onset, but roughly one-third of cases become chronic and persist for years or even indefinitely. How long your symptoms last depends on when treatment begins, your age, and several modifiable health factors.
The Two Phases of CRPS
CRPS progresses through two distinct phases, each with a different character. The first is the acute or “warm” phase, marked by the classic signs of inflammation: the affected limb is hot, red, swollen, and painful. This phase is when the condition is most responsive to treatment.
Around six months after onset, CRPS typically transitions into the chronic or “cold” phase. Inflammation subsides, but the limb may show lasting changes to skin, nails, hair, and even bone density. Pain often shifts in quality, becoming deeper or more constant. Once the condition reaches this stage, it becomes harder to reverse, which is why early intervention matters so much.
What Recovery Looks Like in the First Year
A prospective study tracking patients over 12 months found that the biggest improvements in symptom severity happened within the first six months, then plateaued. This pattern suggests a critical treatment window: the earlier you begin physical therapy and pain management, the more ground you’re likely to gain. After that six-month mark, progress slows but doesn’t necessarily stop.
A systematic review of adult CRPS cases found that symptoms improve markedly within 6 to 13 months for many patients. However, longer-term retrospective studies paint a more mixed picture, with a significant number of people reporting lasting impairments well beyond that initial window.
Who Recovers and Who Doesn’t
About one-third of CRPS patients show no improvement or worsening pain over the course of treatment, according to a study of 150 patients at a pain center. Some of those cases eventually required more aggressive interventions. On the other end, a considerable number of people experience spontaneous remission, meaning their symptoms resolve on their own or with standard care.
Several factors tilt the odds toward recovery or persistence:
- Age: Younger people generally recover faster. Children and teenagers have historically been thought to have resolution rates as high as 50% to 90%, though newer research complicates that picture (more on this below).
- Overall health: Good circulation and nutrition support recovery. Smoking and diabetes make it significantly harder, as does a history of chemotherapy.
- Severity of the original injury: This matters, but your baseline health may matter just as much or more.
Quitting smoking and managing blood sugar are two of the most concrete steps you can take to improve your chances.
Why CRPS Persists After the Injury Heals
One of the most frustrating aspects of CRPS is that the original injury, often a fracture, sprain, or surgery, heals long before the pain stops. The reason is a process called central sensitization: the nervous system itself becomes hypersensitive. Pain-processing neurons in the spinal cord and brain start responding to signals that wouldn’t normally register as painful, or they amplify normal pain signals far beyond what the situation warrants.
Research on CRPS patients with widespread pain has found reduced pain thresholds even in body areas far from the original injury, pointing to a system-wide disturbance in how the brain processes pain. This may involve overactive immune cells in the spinal cord or weakened built-in pain-dampening systems. Once this central rewiring takes hold, it explains why CRPS can outlast the tissue damage that triggered it and why it’s harder to treat the longer it goes on.
CRPS in Children and Teenagers
Pediatric CRPS has long been considered more treatable than the adult form, and there’s real evidence behind that reputation. One study using intensive daily physical therapy (five to six hours a day for up to two weeks) achieved complete resolution in 88% of pediatric patients. Relapse rates in children range from 29% to 37%, but many of those relapses responded to restarting the exercise program.
However, a longer-term follow-up study challenges the assumption that childhood CRPS simply goes away. When researchers surveyed people who had been diagnosed with CRPS as children, 68% reported ongoing CRPS-related pain as adults, ranging from mild to excruciating. Each additional year of age at the time of diagnosis increased the odds of still having pain as an adult by 61%. So while children often recover faster in the short term, a meaningful percentage carry symptoms into adulthood.
What You Can Realistically Expect
There’s no single answer to how long CRPS lasts because the condition sits on a spectrum. At one end, some people recover fully within months, especially with early, aggressive physical therapy. In the middle, many experience major improvement in the first year but are left with some residual pain or sensitivity. At the other end, roughly a third of cases become chronic conditions that require ongoing management.
The strongest predictor of a shorter course is early treatment. If you’re within the first few months of symptoms, this is the window where interventions have the most impact. Beyond that, controlling the factors you can, like smoking, blood sugar, and staying physically active within your pain tolerance, gives you the best chance of moving toward the recovery end of that spectrum rather than the chronic end.