Understanding Complex Regional Pain Syndrome

Complex Regional Pain Syndrome (CRPS) most commonly develops following an injury or surgery to a limb, even if that initial trauma seemed minor. The exact mechanisms aren’t fully understood, but several factors contribute:

• Nerve dysfunction and inflammation: After trauma, peripheral and central nervous system changes (including altered neurotransmitter release, signaling pathways, and neuroinflammation) can perpetuate pain signals beyond normal healing.

• Autonomic changes: Abnormal sympathetic activity may lead to vasomotor and sudomotor disturbances (skin colour/temperature changes, swelling), characteristic of CRPS.

• Central sensitisation: Repeated pain input can “rewire” brain networks involved in pain processing, leading to persistent pain, allodynia (pain from light touch), and hyperalgesia (exaggerated response to painful stimuli).

• Genetic and psychosocial factors: Whilst we don’t understand it complete, individual genetic predispositions and stress, anxiety, or depression may modulate susceptibility and symptom severity.

Diagnosis by a clinician and guided by the “Budapest Criteria.” Essentially, a clinician will look for:

1. Persistent, disproportionate pain in the affected limb (burning, throbbing, stabbing) lasting longer than expected for the inciting event.

2. Signs in at least three of four categories:

   • Sensory: Allodynia or hyperalgesia (e.g., light touch or temperature changes are painful).

   • Vasomotor: Skin colour changes, temperature asymmetry.

   • Sudomotor/Edema: Swelling, abnormal sweating, changes in nail or hair growth.

   • Motor/Trophic: Decreased range of motion, weakness, tremor, dystonia.

3. No other diagnosis better explains the symptoms.

Confirmatory tests (e.g., bone scans, thermography, quantitative sensory testing) are sometimes used, but there is no single “gold standard” test. A detailed history, physical examination, and appropriate imaging or nerve conduction studies help rule out mimicking conditions.

Management aims to reduce pain, restore function, and prevent progression. A multidisciplinary, stepped‐care approach is recommended:

1. Pharmacological therapies (standard of care):

   • Analgesics and anti-inflammatories: NSAIDs, acetaminophen (paracetamol) for mild relief.

   • Neuropathic pain agents: Gabapentin, pregabalin, tricyclic antidepressants (e.g., amitriptyline), serotonin–noradrenaline reuptake inhibitors (e.g., duloxetine).

   • Topical treatments: Lidocaine patches or capsaicin cream for localized pain.

   • Sympathetic blocks: Stellate ganglion or lumbar sympathetic blocks may transiently reduce vasomotor symptoms and pain.

2. Physical and occupational therapy:

   • Graded motor imagery and desensitisation: Retrains the brain’s perception of the affected limb.

   • Range‐of‐motion and strengthening exercises: Prevent joint stiffness and muscle atrophy.

   • Occupational therapy: Adaptive strategies to maintain independence.

   • •  

3. Complementary therapies (adjunctive support):

   • Acupuncture: Some patients report modest, short‐term relief from acupuncture, likely due to endogenous opioid release and modulation of peripheral sensitisation. Small trials in neuropathic pain suggest benefit, but evidence in CRPS is still emerging.

   • Hypnotherapy: May help reduce catastrophising and improve coping, though data in CRPS is limited. Patients with high anxiety or catastrophising scores may derive extra benefit.

   • Mindfulness‐based stress reduction (MBSR): Can decrease central sensitisation and improve quality of life.

   • Nutrition and lifestyle support: Addressing inflammation (e.g., omega-3 fatty acids, antioxidants) and improving sleep/stress resilience through our Thought Movement Food™ program can be valuable adjuncts.

4. Psychological and psychiatric support:

   • Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT): Improve pain coping strategies, reduce fear‐avoidance, and address depression/anxiety.

5. Surgical and advanced pain techniques (for refractory cases):

   • Spinal cord stimulation (SCS): Implantable devices can in some cases reduce pain by >50%.

   • Intrathecal drug delivery: Morphine or baclofen pumps for severe, unresponsive CRPS.

CRPS can be complex to manage, particularly if it has been present for some time. However, many people experience meaningful improvement with timely, coordinated care:

• Early intervention (ideally within the first few months) combined with multidisciplinary support can lead to substantial symptom improvement and help minimise long-term impact for many individuals.
• In chronic cases, while complete resolution is not always possible, a personalised combination of therapies—including physical rehabilitation, medications, psychological support and, where appropriate, emerging options such as rTMS—can help reduce pain intensity and improve daily function for many people.
• Outcomes vary from person to person. Some achieve significant or complete remission, while others learn to manage symptoms effectively at a more tolerable level. We work closely with each individual to support the best possible quality of life.

• Do I need a referral to access your CRPS services?
  
  

Yes. To ensure we provide the safest and most suitable care, a referral is required from your General Practitioner (GP) or a specialist (such as a neurologist, pain physician or rheumatologist). The referral should document your diagnosis or clinical suspicion of CRPS, ideally referencing the Budapest Criteria.

Recent clinical notes and relevant investigations will help our team develop an appropriate plan tailored to your situation.

Yes. In order to ensure the safest and most appropriate care, we require:

1. Referral from a General Practitioner (GP) or Specialist (e.g., neurologist, pain physician, rheumatologist) who has documented your CRPS diagnosis or strong suspicion of CRPS based on the Budapest Criteria.

2. Recent clinical notes and investigations (e.g., imaging, nerve conduction studies) help our team tailor an effective treatment plan.

Yes, we believe strongly in collaborative care. We regularly work together with:

• GPs and specialists (neurologists, pain physicians, orthopaedic surgeons and rheumatologists) for ongoing medication management, diagnostics and procedures such as nerve blocks.
• Physiotherapists and occupational therapists to develop individualised movement, desensitisation and rehabilitation programs.
• Psychologists and psychiatrists for psychological therapies and mental health support.
• Dietitians and exercise physiologists as part of holistic lifestyle support through our Thought Movement Food™ program.

1. Obtain a referral letter from your GP or specialist.
2. Email info@brainaidclinics.com or call 0466 352 811 to speak with our team.
3. We will arrange an initial telehealth consultation (or in-person if you are near the Gold Coast) to understand your history and next steps.
4. Following review, we will schedule an in-person assessment with one of our specialists.

• Wait times depend on current demand. We generally aim to offer initial telehealth assessments within 2–4 weeks of receiving complete referral information.
• For more urgent situations, such as significant flares or rapid changes in function, please ask your referring doctor to note the urgency so we can prioritise where possible.

Yes. Telehealth is available for:

• Initial assessments for people anywhere in Australia, including history taking and planning.
• Follow-up appointments for monitoring progress, adjusting plans and lifestyle support.
• Please note that rTMS treatment sessions themselves require in-person attendance at our clinic.

• Medicare: Standard consultations with our psychiatrists and pain specialists are generally claimable under relevant Medicare items. However, because rTMS for CRPS is currently considered investigational, there is no specific Medicare rebate for the rTMS treatment sessions. These costs are self-funded by the patient.
• Private Health Insurance: Consultations, allied health services (such as physiotherapy, occupational therapy and psychology) and investigations may be claimable under your policy’s extras cover. Investigational rTMS for CRPS is typically not covered, although some funds may have provisions for clinical trials or exceptional circumstances. We recommend checking with your insurer.

Public options and trials: Public multidisciplinary pain clinics or research studies may offer additional support in some states. Your GP can advise on current clinical trials that may help with access.