It's a planters wart I had one of these a couple years ago... They are so hard to get ride off... I suggest you freeze it with Carbon Dioxide. I kept freezing it and freezing it after awhile I just dug it out.
The doctor described a planters wart as a wart that is inside out. You should definitely have a Doc check this out.
yea i think its a planters wart too, i had one on my foot i had to get the doctor to cut out though cause mine was larger, they are pretty much warts that grow in, for a at home treatment he gave me like a drying agent if they come back again so i might look for that too to kill them
there verucas, you get them on the bottom of your feet
you get them from swimming pools like a little thing you catch.
i had one for like 5/6 years i just ignored it the whole time. it just faded away lol nbut you can to the pharmesy and ask for veruca treat ment, use that and your sorted
EDIT: the comments make people think that hes gonna lose his foot hahhahaha