Lump on my foot?

[Japan]

I was walking around places and I wore some flipflops that were really nice but didn't fit me. I got a load of blisters and theres a weird grey/brown lump on my foot where it rubbed. I think it might be mud or something stuck under the skin, and I tried googling it but nothing really came up.
It just appeared this morning, and it really hurts to touch it. I've put some antiseptic cream on it.
Any ideas?

[eight]

It's where your foots been rubbing, It happens alot, I would'nt worry.

[TheEclipse]

Mud doesn't get stuck under skin unless it somehow got in a blister.

[myke]

Urm it might be calusts or something, idk what it's spelt but basically it's where constant rubbing occurs and your skin just lyk goes rly hard and can be sore sometimes

[Soy]

Blisters, caused by constant friction on the skin.

If you want a fast recovery, place your foot in an ice bath for 15 minutes every 4 hours.

[Japan]

So it's nothing to worry about?
I was scared it was an infection.
+REP to everyone =D

[TheEclipse]

Well I've not seen a photo. I'd hope it's nothing to worry about. If it's still there in a few weeks then worry.

[Caution]

It's maybe your toe.

[J0SH]

Sounds like a varooca to me, go to your chemist they can give you cream for it they also provide you with a file thing in with the cream so you can like file it down.

[Arch]

If it doesnt go away id be worried, also if its brownish purple
you coulda popped a vein