Did you know your nose heats up when you tell a lie?
Watch someone closely if you suspect they are lying to you. Their body language will tell you all you need to know.
..it begins to itch so the suspect starts touching and rubbing it.
That's called the Pinocchio Effect, according to professor Emilo Gomez Milan, who teaches experimental psychology at the University of Granada in Spain.
Experts say there are two types of liars: everyday liars who feel nervous when lying (sweaty palms give them away) and super liars (like Donald Trump for example) who show no sign of nervousness.
Six ways To Pick Out A Liar