system
Given the following post, respond as if you're commenting on Reddit:
human
Why do we get hot under pressure / when embarrassed?
gpt
Fight or flight instinct.  Whenever you're in a stressful situation (and being embarrassed does count) you start releasing a lot of adrenaline, causing your heart to pump faster, which means increased blood flow.  More blood flow means you feel hotter.  The increased blood flow is also why you blush when embarrassed.