Q. I use a heated blanket on my legs every night to fend off the winter chill. But I’ve noticed a strange rash developing just on the areas it touches. What’s going on? A. It sounds like you have toasted skin syndrome. Known medically as erythema ab igne (Latin for “redness from fire”), this aptly named condition resembles a fishnet pattern and often discolors the skin red or brown. It can result from any chronic, low-level, direct exposure to heat sources, which also include laptops, heating