Complex Regional Pain Syndrome in Kathmandu — Understanding and Treating Chronic Pain

Complex regional pain syndrome (CRPS) is a chronic pain condition that typically develops after an injury, surgery, stroke, or heart attack. It is characterized by severe, persistent pain that is disproportionate to the initial injury and accompanied by changes in skin color, temperature, and swelling. CRPS most commonly affects an arm or leg, and the pain can be debilitating without appropriate treatment.

CRPS is classified into two types. CRPS-I (formerly called reflex sympathetic dystrophy) occurs without confirmed nerve injury. CRPS-II (formerly called causalgia) occurs with confirmed nerve injury. Both types share similar clinical features and treatment approaches. The condition typically develops within 4-6 weeks after the inciting event, though delayed onset is possible.

Dr. Jitendra Prasad Yadav — consultant neurologist & headache specialist at Kathmandu Neurology Clinic & Cognitive Center provides evidence-based evaluation for peripheral neuropathy.

Symptoms beyond pain are characteristic and help distinguish CRPS from other pain conditions. The affected limb may be warmer or cooler than the unaffected limb. Skin color changes — red, blue, pale, or mottled — are common. Swelling (edema) is often present. Abnormal sweating patterns and changes in nail and hair growth may occur. Motor symptoms include weakness, tremor, or dystonia. The pain is often described as burning, throbbing, or squeezing and is typically triggered by stimuli that would not normally cause pain (allodynia).

The exact cause of CRPS is not fully understood, but it appears to involve a complex interaction between the nervous and immune systems. Theories include abnormal sympathetic nervous system activity, central sensitization of pain pathways, inflammatory responses, and psychological factors. Why some people develop CRPS after injury while others do not remains unclear.

Diagnosis is clinical, based on the Budapest criteria which require the presence of specific sensory, vasomotor, sudomotor/edema, and motor/trophic signs. There is no single diagnostic test for CRPS, though imaging (bone scan, MRI) and nerve conduction studies may be used to exclude other conditions and support the diagnosis. Early diagnosis is critical because outcomes are better when treatment begins within the first few months.

Treatment requires a multidisciplinary approach. Physical therapy is the cornerstone — gentle, progressive movement prevents stiffness and maintains function. Occupational therapy helps with daily activities. Medications may include neuropathic pain agents (gabapentin, pregabalin, duloxetine), bisphosphonates, and in some cases, low-dose corticosteroids during the inflammatory phase. Interventions such as sympathetic nerve blocks, spinal cord stimulation, or intravenous ketamine infusions may be considered for refractory cases.

Psychological support is important because chronic pain often leads to depression, anxiety, and reduced quality of life. Cognitive behavioural therapy helps patients develop coping strategies and address the psychological impact of chronic pain.

At Kathmandu Neurology Clinic & Cognitive Center, Dr. Jitendra Prasad Yadav (NMC 8029) evaluates suspected CRPS and coordinates with physiotherapy, pain medicine, and psychology services to provide comprehensive care. Early referral for multidisciplinary treatment is emphasized.

This article is educational and does not replace individual medical advice.

**Frequently Asked Questions**

Q: Is complex regional pain syndrome curable? A: CRPS is not curable in the sense that the condition can be completely eliminated, but many patients experience significant improvement with early, multidisciplinary treatment. Some patients achieve remission, while others have chronic symptoms that require ongoing management.

Q: What triggers complex regional pain syndrome? A: CRPS typically develops after an injury, fracture, surgery, stroke, or heart attack. However, the severity of CRPS is disproportionate to the initial injury. Why some people develop CRPS and others do not is not fully understood, but factors including genetic predisposition and abnormal immune responses may play a role.

Q: How is complex regional pain syndrome diagnosed? A: Diagnosis is clinical, based on the Budapest criteria which require specific signs and symptoms including disproportionate pain, temperature asymmetry, skin color changes, swelling, and motor abnormalities. Imaging and nerve tests may be used to exclude other conditions but do not diagnose CRPS.

Q: What is the treatment for complex regional pain syndrome? A: Treatment is multidisciplinary. Physical therapy with gentle movement is essential. Medications include neuropathic pain agents and sometimes corticosteroids. Interventions such as nerve blocks or spinal cord stimulation may be considered. Psychological support addresses the impact of chronic pain.

Q: Can CRPS spread to other parts of the body? A: Yes, CRPS can sometimes spread from the initially affected limb to other limbs, though this is not common. Spread is more likely when treatment is delayed or inadequate. Early treatment may reduce the risk of spread.

Q: How long does complex regional pain syndrome last? A: The course varies significantly. Some patients recover within months with early treatment. Others experience chronic pain lasting years. Factors associated with better outcomes include early diagnosis, prompt multidisciplinary treatment, and early physical therapy to maintain movement.