system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do humans feel hot when they get angry?
gpt
Nurse here: an increase in sympathetic nervous response (fight or flight). This increases heart rate and blood pressure.  Blood vessels constrict to increase this pressure causing a retention in heat that would have otherwise been dissipated by blood vessels closer to the skin. The increase in heart rate only adds to this.