RESUMEN
Erythema ab igne is a characteristic reticular telangiectatic and pigmented dermatosis, resulting from repeated or prolonged exposure to heat or infrared radiation insufficient to cause burns. Occupational history has played a pivotal role in dermatological diagnosis, and its importance cannot be overstated. It could lead to the provisional or final diagnosis in many instances.Over the course of time, the site and cause of erythema ab igne has evolved. From commonly being found on knees shins and palms due to tapnas (a practice in Indian villages to sit in front of fire); the disease is now observed on other sites such as on thighs and trunk after the discovery of heating pads and laptops.In thisparticular case, a 26-year-old male presented with erythematous to light brown patches on his right arm. The site of presentation was quite unusual, thus making occupational history the key to diagnosis.