The only spider I kill is the white tail, it’s a spider predator and can necrotise the flesh. It will leave a nasty scar. I have an old bite under a tattoo, and whatever it’s done, a couple of hairs won’t stop growing in length. My wife always pulled them out whenever she notices them. One hair I managed to grow in excess of 6”…that’s bigger than a typical man’s penis length (or so I’m led to believe) lol