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It is possible that the main title of the report Erythromelalgia is not the name you expected.

Disorder Subdivisions

  • None

General Discussion

Erythromelalgia is a rare condition that primarily affects the feet and, less commonly, the hands (extremities). It is characterized by intense, burning pain of affected extremities, severe redness (erythema), and increased skin temperature that may be episodic or almost continuous in nature. (The prefix "erythro-" denotes redness, "mel-" is a combining form meaning limb or limbs, and the suffix "-algia" indicates pain.) Although erythromelalgia typically affects both sides of the body (bilateral), it may sometimes involve only one side (unilateral). In addition, the disease course may be extremely variable from case to case. For example, in some individuals, symptom onset may be gradual (insidious), with the condition potentially remaining relatively mild for years. However, in others, it may have a sudden (acute) onset, possibly spreading and becoming severe over weeks.

The specific underlying cause of erythromelalgia remains unknown. However, the condition is thought to result from vasomotor abnormalities or dysfunction in the normal narrowing (constriction) and widening (dilation) of the diameter (caliber) of certain blood vessels, leading to abnormalities of blood flow to the extremities. Erythromelalgia may be an isolated, primary condition or occur secondary to various underlying disorders. Primary erythromelalgia may appear to occur randomly for unknown reasons (sporadically) or may be familial, suggesting autosomal dominant inheritance.

Supporting Organizations

Erythromelalgia Association

200 Old Castle Lane
Wallingford, PA 19086
Tel: (610)566-0797

Genetic and Rare Diseases (GARD) Information Center

PO Box 8126
Gaithersburg, MD 20898-8126
Tel: (301)251-4925
Fax: (301)251-4911
Tel: (888)205-2311

NIH/National Institute of Arthritis and Musculoskeletal and Skin Diseases

Information Clearinghouse
One AMS Circle
Bethesda, MD 20892-3675
Tel: (301)495-4484
Fax: (301)718-6366
Tel: (877)226-4267

For a Complete Report

This is an abstract of a report from the National Organization for Rare Disorders (NORD). For a full-text version of this report, go to and click on Rare Disease Database under "Rare Disease Information".

The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only.

It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report.

This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.

Last Updated:  4/27/2015
Copyright  2015 National Organization for Rare Disorders, Inc.