system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does blushing work? How come we don't blush on other parts of our body?
gpt
Blushing is a consequence of blood flowing to the brain as the brain requests more blood to be pumped due to overthinking. When you are blushing/feeling anxious/embarrassed, your brain goes into overdrive mode, which requires more oxygen, which is transported by the blood, hence more blood. All that blood flowing there also goes to the other blood vessels along the way, which are on the face.