Warts underneath foot.

Wart is from viruses: Vague question, but a wart is a lump on the skin caused by papilloma viruses (it sometimes spreads to others). A corn is a lump of dead skin material formed where there is repeated pressure or friction on the skin (happens without viruses). Both lumps can push into the bottom of a foot because on the sole, a person stands or walks on the lumps all day.

Using this site: You get the most specific and reasoned answers from this site when you provide detailed background information on your health issue and then ask a related question. Your vague statement does not meet that criteria. Yes, people get plantar warts on their feet which are hard to treat. If you have a specific question you can start over. Your posts are not linked. Each needs to have all relevant info.