system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What causes the “itchiness” of a healing cut/scrape/burn etc.?
gpt
Special cells in your body known as fibroblasts throw up a mesh fiber net over wounds to help protect them from the outside and act as a scaffold to help other cells repair the area.

As these wounds heal, the fibers will tighten and pull together to help close the wound. However, the tugging of these fibers on the wound triggers certain nerves in your skin. These nerves are designed to detect the extremely light touch a bug on your body and warn you that its there by the feeling of "itchiness." Your typical response to an itch is to scratch it and hopefully remove the bug. The pull of the mesh will accidentally stimulate these nerves and you end up getting the feeling of itchiness around the wound.

You should avoid scratching it as breaking open the wound and/or scab too early can cause additional damage or infection which can lead to additional scaring. Try rubbing or scratching around the wound to get rid of the feeling.