Got infection under fingernail. Turned purple, swelled up like a grape. Got hard and calloused. Then one day it emitted vile stuff from under the fingernail, deflated. A couple days later, callous fell off. Fingertip underneath was half-width but complete. Over next year, the other half grew back - fingertip got a little wider over time until it's the right width.

Now I can't quite remember which one it was - they are all the same and unscarred.