Decoding the Nostril FlareThis facial twitch signals a readiness for action.

From the show

Reading People Signals

Observing when someone's nostrils flare can give you a crucial insight into their true emotional state. This involuntary signal is tied to the body's primitive fight-or-flight response, occurring when the brain anticipates a need for more oxygen due to anger or arousal. It's a limbic reaction that happens before a person may have even consciously decided to act, showing their body is preparing for a confrontation, even if they're sitting perfectly still.