system
Given the following post, respond as if you're commenting on Reddit:
human
Why does a wound itch when healing?
gpt
Cytokines and histamine make you itch. They're released by the body in areas of injury and promote healing. The itching is a by-product. Also, as the wound begins to heal, the new skin cells and collagen sort of entrap the small pre-existing nerves as they grow, which is perceived as itching.