system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are wounds itchy? It seems counter productive for you to scratch at a scab or wound.
gpt
As your wound heals, skin cells multiplying and joining together stimulates the nerves in your skin which your brain perceives as itchiness. It’s also a different way that your brain draws your attention to the fact that you still have a wound (i.e. itchiness instead of pain).