[jacoblambda]

It's not that the body's response is problematic. It's that scratching is still problematic even if it does help some. The main issue with scratching is that it injures the surrounding skin including mostly healthy or completely healthy skin. This comes with a host of problems that are well established in plenty of other literature:

- Contaminating the site

- Spreading whatever is causing the initial wound

- Weakening the skin barrier and allowing whatever contaminant/infection to penetrate deeper/spread below the skin.

TLDR: They show a potential benefit of scratching (which may explain why it evolved in the first place) but suggest it doesn't outweigh all of the established harms.