How do i get rid of a boil on the bottom of my foot?

Incise & drain: The definitive treatment for a boil is incision and drainage. Try soaking the foot in hot water to see if it will drain on its own. If not, it will have to be lanced, but don't attempt this yourself - it will hurt too much and you run the risk of making things worse, particularly on the sole of the foot. Let a doctor do it under the proper sterile conditions, with an anesthetic.