system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does sunburned skin feel warm to the touch even a day later?
gpt
Because your immune system is busy, killing off damaged cell before they become cancerous, and new cells are being made to replace them. Every bodily function produces heat, but it’s more noticeable when it’s a combination of large scale and close to the skin’s surface.