system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does a sunburn not hurt for several hours after actually being in the sun too long?

Worked out in the yard yesterday in the blistering heat and got a sunburn on my neck. When I came in I knew I must have burned my neck but figured it would take a few hours to know if it was going to hurt or not, curious why the pain comes so many hours after the "damage"?
gpt
As your body's response, capillaries open up, allowing more blood to the affected area. This aids in the healing process but also makes the area feel warmer and more tender. However, the response isn't immediate, taking the noticeable few hours before the inflammation sets in.