Many people have a habit of working on a computer on their lap for a long time.Photo: Telegraph.co.uk.
In another case in Virginia, a female law student also saw thigh skin suddenly become unusually speckled.
Professor Kimberley Salkey, who treated the young girl, was unable to find the cause of the condition, until she knew the student had worked six hours a day with a lap computer. The temperature measured below this machine is 52 degrees centigrade.
"Grilled skin syndrome" can also occur when abuse of heating pads and heat sources are not hot enough to cause other burns.
"Normally they are harmless, but if used long-term it can cause permanent skin damage. In a few cases, it can lead to skin cancer , " said Dr. Andreas Arnold and Peter ITIN, University Hospital Basel, Switzerland.
Experts recommend, to be safe, laptop users should put on a stand or have a heat shield when using a laptop.