I have had issues with my Dell laptop (bought new at Costco 9 years ago) for a very long time. I used it quite often for hours at a time. It has always run very hot. No amount of pillows or anything prevents the searing heat. I developed what can be best described as fat pads about 8" above my knees. It also burned like crazy. There is no discoloration. I stopped using it that way about a year ago. I recently used it several times and the bump reappeared on my left thigh and burns like crazy. I get the distinct impression it's radiation. At the very least it can't be healthy. looked for validation of this online a long time ago but found nothing until now. I keep saying we are all a bunch of guinea pigs for everything including medication that couldn't have done a decade or so of testing. Lucky us. I am waiting for some study to come out and tell us why it does this and hopefully protect us and make them safer to use.