The whole healing of broken bones, joint and tendon repair, and wound healing thing in cats is why they purr to themselves when they're hurt as well as to other cats (and us) as a sign of friendship. Like, “I'm gonna help heal you bud”.
As,a catgirl, I cannot purr, but I have tools that vibrate thst might help 🥺👉👈
@FuchsiaShock My cat started purring on my chest after I've had a sprained ankle!!!