Erythema ab igne

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ΕΤΥΜΟΛΟΓΙΑ

Latin : redness from fire

A common rash characterised by reticulated telangiectasia and hyperpigmentation caused by repeated exposure to a heat source such as a hot water bottle or laptop[1][2]. It is present in up to 3% of an Italian population[3].

Contents

Differential diagnosis

An area of reticulated erythema that blanchs is rather suggestive. Consider:

Treatment

Removal of the triggering heat source will result in resolution over several weeks to months in most presentations. Persistent hyperpigmentation is known and may respond to tretinoin or hydroquinone.

Complications

Malignant change, as for other sites of constant trauma, is possible after decades of exposure. Squamous, merkel cell carcinomas and cutaneous lymphoma have been described.

References

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