The literature contains many case reports of that characteristic cutaneous reaction to the extended local application of heat variously known as erythema ab igne, erythema caloricum, dermatitis ab igne, dermatitis calorica, livedo reticularis pigmentosa (calorica) and cutis marmorata pigmentosa. The history in these cases was usually that heat was applied directly for therapeutic purposes, or that from occupation or habit the patient came in close contact over an extended period with more or less intense heat, either dry or moist. Cases have been reported by Abramowitz,1 Mook,2 Freund,3 Wise,4 Levin,5 Traub,6 Walzer,7 Bechet8 and Little.9 The lesions described varied from small patches of festooned erythema to more extensive areas of reticulated erythema and pigmentation, occasionally containing scaling, lichen planus-like papules or elevated flat plaques.
In 1926, Michael10 reported the results of his study of the effects produced on the skin
TANNENHOLZ H. ERYTHEMA CALORICUM ASSOCIATED WITH A REMOTE REACTION TO HEAT (NEURODERMATITIS AND DYSHIDROSIS): HEAT ALLERGY. Arch Derm Syphilol. 1933;28(2):168–173. doi:10.1001/archderm.1933.01460020022005
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