Tfw.
I had an awful case of that on both my big toes, for years. Got surgery several times but it always grew back worse.
Did end up going full retard on them with a knife a few years back. They'd swollen to double their original size, oozing pus and blood at all times. So I had to cut all that away and more to remove the 'ingrown' part and try to bend and bind the sides so they'd grow back 'normally'.
Thankfully most of the swollen flesh did not have any nerve endings so that didn't really hurt. But it bled A LOT. Couldn't see what I was doing so I had to stop several times and wait for the flow to end so I could clean it up a bit and continue.