[Erythermalgias]

Area of Science:

• Vascular Medicine
• Hematology
• Dermatology

Context:

• Erythermalgia is a rare condition causing recurrent episodes of red, warm, and painful extremities.
• Clinical classification distinguishes primary erythermalgia (often childhood-onset) from secondary forms linked to myeloproliferative disorders, drugs, or vasculitis.

Purpose:

• To review the clinical classification and potential mechanisms of erythermalgia.
• To highlight the differential response to aspirin in primary versus secondary erythermalgia.

Summary:

• Erythermalgia presents clinically with painful, red extremities.
• Secondary erythermalgia, associated with myeloproliferative disorders, may involve intravascular platelet activation and responds to aspirin.
• Primary erythermalgia's pathophysiology is unknown, and it typically does not respond to aspirin.

Impact:

• Provides a clear classification of erythermalgia for clinicians.
• Suggests a mechanism for secondary erythermalgia and its treatment.
• Underscores the need for further research into the causes of primary erythermalgia.