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complex-regional-pain-syndrome

Complex Regional Pain Syndrome

Complex Regional Pain Syndrome (CRPS) is a chronic, often debilitating pain condition that typically affects an arm or a leg after an injury, surgery, or trauma — even when the initial injury seems minor. The pain experienced in CRPS is out of proportion to the original injury and may include changes in skin appearance, temperature, and sensation. CRPS can develop without a clear cause and may evolve over weeks to months. Early diagnosis and treatment can help improve function and reduce long-term symptoms.
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Causes & Risk Factors

The exact cause of CRPS isn’t fully understood, but it is widely believed to involve a malfunction in the nervous system’s response to injury. Most cases occur after a distinct physical trauma such as:
  • A fracture or sprain 
  • Surgery or orthopedic procedures 
  • Soft tissue injuries like burns or cuts 
  • Minor injuries that don’t seem serious at the time 
Two main types of CRPS are recognized:
  • Type I — Occurs without a confirmed nerve injury (formerly called reflex sympathetic dystrophy).
  • Type II — Occurs after a confirmed nerve injury. 
While CRPS often begins after an injury, the nervous system’s abnormal pain signaling and inflammatory processes appear to play a central role in its persistence.

Common Symptoms

CRPS symptoms vary but commonly include: Pain
  • Persistent burning, throbbing, or stabbing pain
  • Pain that is disproportionate to the injury
  • Pain that may spread beyond the original site 
Sensory & Autonomic Changes
  • Increased sensitivity to touch or cold
  • Skin temperature changes (warmer or cooler than the opposite limb)
  • Changes in skin color (red, blue, blotchy, pale)
  • Sweating abnormalities
  • Skin texture changes (shiny, thin) 
Motor & Functional Changes
  • Joint stiffness and limited range of motion
  • Muscle weakness or spasms
  • Decreased function in the affected limb
  • Swelling or edema 
Progression Symptoms may fluctuate over time and, in some cases, can lead to long-term disability without appropriate intervention.

How CRPS Is Diagnosed

There is no single diagnostic test for CRPS. Diagnosis is based on a detailed physical exam, medical history, and symptom pattern. Your clinician may recommend:
  • X-rays to assess bone changes
  • MRI or CT scans to rule out other causes
  • Bone scans to detect bone abnormalities
  • Autonomic testing or thermography to evaluate nerve function and temperature changes 
These tests help distinguish CRPS from other pain disorders and guide the treatment plan.

Treatment Options for CRPS

There is currently no known cure for CRPS, but early, comprehensive treatment can improve symptoms and function. Medications Medications may be used to target pain and inflammation:
  • Pain relievers (NSAIDs or prescription pain medicines)
  • Neuropathic pain agents (antidepressants, anticonvulsants)
  • Corticosteroids to reduce inflammation
  • Bone-protective medications for bone metabolism
  • Sympathetic nerve-blocking medications
  • Low-dose ketamine infusions in specific cases 
Physical & Occupational Therapy
Gentle movement, range-of-motion exercises, and desensitization activities can:
  • Improve blood flow
  • Restore flexibility
  • Maintain strength
  • Enhance daily function 
Therapies such as graded motor imagery and mirror therapy help “retrain” the brain’s perception of the affected limb.
Interventional Pain Procedures
  • Sympathetic nerve blocks to interrupt pain signaling
  • Spinal cord stimulation to reduce pain messages
  • Peripheral nerve stimulation for targeted relief
  • Intrathecal drug pumps for continuous medication delivery 
These treatments are considered when conservative approaches are insufficient or pain is severe.
Psychosocial & Supportive Care
CRPS can impact emotional well-being. Behavioral therapy, biofeedback, and pain coping strategies can be important components of a comprehensive care plan.

Prognosis — What to Expect

The course of CRPS varies. Some people experience improvement over time, especially when treatment begins early. However, symptoms can persist and, in some cases, lead to functional limitations. Continued care focused on reducing pain, maintaining mobility, and addressing emotional well-being offers the best chance for long-term improvement.

FAQs

 No. CRPS is a specific pain syndrome that involves abnormal nervous system responses and distinct sensory and autonomic features.

Yes — in some cases, symptoms can extend beyond the original limb over time.

Yes. Evidence suggests that starting treatment early offers the best chance of symptom reduction and functional recovery.

Treatment Offered By Kansas Pain Management

Kansas Pain Management offers a comprehensive pain treatment plan that is tailored to each patient’s specific needs. The first step is a thorough evaluation, which includes a medical history, physical examination, and diagnostic testing, if necessary.
Treatment options may include medications, physical therapy, injections, or surgery, depending on the underlying cause of the pain.

Kansas Pain Management also offers a range of minimally invasive procedures to help alleviate pain and restore function. With board-certified and fellowship-trained physicians, Kansas Pain Management is committed to providing the highest quality care for patients suffering from pain. You can book an appointment with us at Overland Park, Lawrence, Leavenworth/Lansing, Roeland Park, etc. We also serve nearby locations like Ottawa, Missouri, Topeka, Belton, Manhattan, Lee’s Summit, Johnson County & Kansas areas.

FAQs

CRPS usually develops after an injury, including fractures, soft-tissue trauma, or surgical procedures.

CRPS Type I occurs without peripheral nerve injury and represents about 90% of cases. CRPS Type II occurs when a peripheral nerve injury is present.

Sharp, burning pain that makes touching the affected skin painful is the most common symptom.

Yes, people with CRPS often experience noticeable color and temperature changes in the affected limb.

Treatment options include medications, physical therapy, sympathetic nerve blocks, epidural steroid injections, spinal cord stimulation, dorsal root ganglion stimulation, intrathecal pumps, nerve blocks, and decompression surgery.

DRG stimulation is used for patients who do not respond to less invasive CRPS treatments and is considered an excellent next-step option.