I felt some acute pain while walking for a half-year or so. It was increasing over that time, so I went to the doctor. Doctor said it was a papilloma wart under the sole skin, so she cut off the skin with some milling cutter(no Idea what it is called in English) and then pour some acid (even the smoke was obviously visible!) into the wound. It was painful, but FAR from how I expected it to be.
The duct tape, or other cover methods soften the skin, it seems to keep the sweat/moisture in that area. Like if you’ve ever stayed in a pool way to long and your finger and toes prune up, it eventually reaches a point where you can easily tear a piece of skin off easily