system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is that tingling/itchy/hot/pain that dots across our body when we enter a warm building after being in the cold while wearing really warm clothes?
gpt
When you're cold, blood moves to more needed areas, like your chest, head, and anything else more vital than simple areas like your hands and feet. When you move from cold to hot, the blood rushes back to these smaller areas. Think of it like a traffic jam. Blood is rapidly rushing back to your hands when you put them under warm water after being cold, and there is a lot of pressure, causing that "tingling/itchy/hot/pain."