I've been in a lot of pain lately and technology like this is probably why. Keep in mind this article was written ten years ago.
[...] Raytheon's Active Denial System (ADS), a directed energy weapon used for "crowd control." Known for its "goodbye effect," it functions as a primitive, though highly-effective "pain ray" by heating the skin to around 130 degrees F.
"Non-Lethal" Weapons: Where Science and Technology Service Repression