What's going on with my foot?

If it's like a "dent" or a rough hole it might be a wart ... Try putting silver duct tape on it (sounds weird but it worked for me!) ... It might take a little while to start working but if you put the tape on and keep it on all day, only taking it off to shower or if it falls off and replacing it right after, it should start to pull the infection out ... It's so weird! You start pulling up little black things and then one day its healed! Mine took about a month- month and a half to heal completely but it was soo worth it, and it hasn't come back in more then 2 years.