Erythema ab igne. This disorder results from prolonged and repeated exposure to infrared radiation. Historically, and before the advent of central heating, erythema ab igne was seen on the legs of individuals who sat or stood in front of heating devices. In this era, more common causes are hot water bottles and heating pads. The patient used a heating pad for relief from menstrual cramps.
Color Atlas of Pediatric Dermatology
Samuel Weinberg, Neil S. Prose, Leonard Kristal
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