Researchers in Granada, Spain investigated the effect of lying on the temperature of a person’s face. They discovered that the temperature jumps, specifically in the region around the nose.
Using a technique called thermography, it was found that the temperature rises around the area of the nose and the inner corners of the eye.
So if you suspect someone of lying, then watch out for a red nose.
Picture and info source:
“Pinocchio “ photo. Know4now.com. 29 September. 2013. 1 Dec. 2013.