It sounds like a verucca, I had a problem with them when i was at primary school. I went to the doctors and the doctor said it will just go with time, just wear socks so others dont catch it and keep the foot clean. They said i was probably caught it from the school swimming pool. Anyway a few years later, still there, infact there were then about 5! So i went back to the doctors and said theyre not going and they said to leave them be.
Wasnt working, I would ge rid of them my way. I bout a foot file and pumice, used them whenever i showered, and it did get a bit sore. Then i bought a liquid nitrogen applicator thing - it was a new thing out to get rid of veruccas and warts. although it saidt only use it once, i used it once a week for a month and froze them. Within 1 1/2 months, completely gone! :)
Hello. I had one on my foot a few years back and never had to see a doctor..Now i can't remember what i used exactly, but i do know that it was either a circular pad that stuck to the bottom of your foot, or it was actually a cheap liquid wart remover. Maybe i used both, but whatever i used it quickly went away.
Hello. Have him go to a surgeon. It's a plantar wart. It can easily be removed. I recommend seeing a surgeon because if it's not completely removed, it can come back. It takes less than five minutes to remove it. Good luck.