3 ms·
tl;dr Scratching an itchy spot boosts the local inflammation and immune response. I know people hate the "just so" stories, but from an evolutionary perspectiv
by ryandvm 2y ago
tl;dr Scratching an itchy spot boosts the local inflammation and immune response.
I know people hate the "just so" stories, but from an evolutionary perspective it makes sense. You get a parasite, it itches, you scratch it, which removes the parasite and kicks up the local immune response.
- andrewflnr 2y ago> which removes the parasite This is probably one of the big evolutionary factors they didn't mention. Scratching at mosquito bites after the mosquito is already gone might just be an unfortunate side effect.