My kid got a plantar wart on her thumb. I know that's weird, and you're probably thinking, like I was, that that was impossible, and it must just be a common wart. Apparently, the thick skin on top of your fingertips is similar to the skin on your feet, and a plantar wart can be quite happy there for quite some time, as proven by the one on my kid. She has had that thing for months. So many months that I can't even remember how long. At first I thought it was a blister, so I didn't worry about it, but then it never went away and took on more of the proper, recognizable form.
Took her to the doctor; had it frozen once or twice. Also used the Dr. Scholl's home freezing on it, and it still stuck around. Tried the whole duct tape thing, but seriously, I had to wrap her up like a mummy, and the tape still fell off.
Lamenting that I needed to call the doctor again and that the stupid duct tape wasn't working, Superman said, "hey, why don't you try crazy glue. It should suffocate it." Hmmm....why had I not read about this? It seems like a logical thing. If duct tape is supposed to suffocate it and kill it, then crazy glue theoretically should work. Didn't hurt to try.