system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do wounds itch when healing, prompting us to scratch and potentially re-damage the area?

Edit:
To sum things up so far, in no particular order:

* because evolution may not be 100% perfect
* because it may help draw attention to the wound so you may tend to it
* because it may help remove unwanted objects and / or remove parts of the scab and help the healing process
* because nerves are slowly being rebuilt inside the wound
* because histamine

Thanks for the answers guys.
gpt
Part of the healing process is removing any potential pathogens that may have gotten into the wound, so there is an inflammatory response at the site of injury. More blood flows to the area and more white blood cells are recruited to kill stuff, and in the process release different chemicals that cause you to be itchy, like histamine.