I had one the size of a golf ball. Did the doctor thing and scrapping ad infinitum.

As a hypnotist I thought mind control might help but I saw no progress. When it became most painful I threw away ALL my shoes except for one and declared with every ounce of my body and soul that I give up fighting it and immediately took a nap. 45 minutes later the golf ball sized plantar was totally gone save for its outer callous.

Surrender may have had something to do with it but it is in a realm in which a conscious explaination would be counter productive.