Not only does this have a cool name, but it’s also kind of interesting. The youngest case of laptop erythema ab igne was just reported, in a 12 year old boy. What is this awesome sounding disease, you ask? Basically a weird rash that you can get when the skin of your thigh is exposed to the high temperatures of a laptop for prolonged periods of time, I write, as I sit here typing on my laptop.
You can avoid it pretty easily be taking frequent breaks and trying not to have the hot laptop directly in contact with your lap.
Citation: AW Arnold and PH Itin. Laptop Computer–Induced Erythema ab Igne in a Child and Review of the Literature. J. Pediatr. 2010;126:e1227-e1230.