What's this and WWYD about it?

[Qwerty111]

This thing on my foot is like a soft fluid-filled blister but is deep so has loads of layers of skin on top. Hard with soft inside IYSWIM (armadillo).

Only recently found you sporners but loving your work I know you'll understand when I say I am both intrigued and annoyed by this squishy fella. It's a bit sore because part of it's under my foot; it's time we said goodbye.

Have tried:
Footner - no effect
Filing until my arms ached - good effect on the general hoofness but just made Mr Squish sore.
Poking with a needle - stopped because it hurt and I was nowhere near the squashy goodness.

What is it and WWYD next?

I would go and visit a chiropodist and get them to lance it. (While you film it, obviously!)

It's a blister under the callused skin, which will be v painful to lance yourself. I think it's probably best to see a professional and get it sorted.