OP many years later. It doesn't appear to be a wart. I've been able to work it down almost all the way with cantharone treatments but it comes back in due course. Still no clue what to do about it.

OP here. Could be. It's under so much callus it's hard to tell. It's on the big toe and it's very much a big dot, but with with a deep "core". I get that the treatment is similar, but reading about porokeratosis it's all scary, could be precacerous, etc.

Agree with previous poster, sounds very much like a plantars wart. They can be stubborn.

It’s not a planters wart?

I have an issue that is dermatologic/podiatric but the internet has practically no useful resources that I could find.

I have a painful callus with a a deep center on my foot, have had it for years. I've been doing the peel-treat type of treatment for we a while and it is very stubborn.

Podiatrists have called it a "porokeratosis"/"porokeratoma", which it may be but it is the one spot and doesn't really match the descriptions of this disease on dermatology websites at all. In fact I can't even figure out if the dermatologists and podiatrists are talking about the same thing.

Nothing on Reddit.

Anyone have experience with this?