Overview
Complex regional pain syndrome (CRPS) of the foot involves chronic pain, swelling, and functional impairment following an injury or trauma, often disproportionate to the inciting event. 1Diagnosis
Clinical Presentation: Pain disproportionate to injury, sensory abnormalities, and motor dysfunction 1.
Physical Examination: Focus on plantar foot assessment and gait cycle evaluation 1.
Imaging: Weight-bearing radiographs to rule out anatomic abnormalities 1.Management
First-Line Treatments:
- Physical Therapy: To improve mobility and strength 1.
- Orthotics: Custom or prefabricated to address biomechanical issues 2.
- Shoe Wear Modification: To reduce pressure and improve comfort 1.
- Injections: Such as corticosteroids for localized pain relief 1.
Adjunctive Treatments:
- Pharmacologic Management:
- Acetaminophen: For mild pain relief 3.
- Nonsteroidal Anti-Inflammatory Drugs (NSAIDs): For inflammation and pain 3.
- Topical Medications: Including NSAIDs or capsaicin for localized pain 3.
- Gabapentin: For neuropathic pain components 3.
- Tricyclic Antidepressants: For chronic pain management 3.
- Opioids: Reserved for severe pain when other treatments fail, with caution due to risks in older patients 3.Special Populations
Elderly Patients: Foot pain management is crucial to prevent disability; consider pharmacologic options carefully due to polypharmacy and comorbidities 3.Key Recommendations
Thorough Physical Examination and Weight-Bearing Radiographs for Diagnosis: Essential for identifying CRPS in the foot 1 (Evidence: Strong).
Initial Treatment with Nonoperative Measures: Including physical therapy, orthotics, and shoe modifications 1 (Evidence: Strong).
Consider Pharmacologic Interventions Based on Pain Severity: Utilize NSAIDs, gabapentin, and tricyclic antidepressants for persistent pain, with opioids as a last resort 3 (Evidence: Moderate).References
1 Charen DA, Markowitz JS, Cheung ZB, Matijakovich DJ, Chan JJ, Vulcano E. Overview of Metatarsalgia. Orthopedics 2019. link
2 Kripke C. Custom vs. prefabricated orthoses for foot pain. American family physician 2009. link
3 Martin EW. Pharmacologic management of foot pain in the older patient. Journal of the American Podiatric Medical Association 2004. link