Erythema ab igne (EIA) presents as a reticulated hyperpigmented erythematous eruption at sites of prolonged heat exposure. While primarily asymptomatic and self-resolving after removal of the heat source, some chronic cases may require topical therapies such as retinoids for improvement of skin discoloration or 5-fluorouracil if dysplastic changes are present. Though rare, few cases may also progress to cutaneous malignant neoplasms, such as squamous cell and Merckel cell carcinoma.
Patel DP. The Evolving Nomenclature of Erythema Ab Igne—Redness From Fire. JAMA Dermatol. 2017;153(7):685. doi:10.1001/jamadermatol.2017.2021
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