HOT DRUNK: Hot face gives away when you’ve drunk too much. “We all know the telltale signs of someone whose had a little too much to drink – slurred speech, swaying walk and a red flush in the face. But what you might not realise is that as the alcohol causes dilation of blood vessels in the surface of the skin, certain parts of your face warm up disproportionately. Now a team at the University of Patras in Greece has come up with two different ways of measuring these temperature changes to automatically detect when someone has been drinking.”