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You need to see your podiatrist asap. No, this is not normal for a plantar wart to become infected in this way. If the infection is not treated it can turn into sepsis, cellulitis in your foot and leg, and maybe even gangrene. This may have to be drained and the damaged tissue removed and a stout antibiotic also, and the longer you wait...the worse it is going to get. Don't wait, see your doc so this can be taken care of early, before it puts you in the hospital.
Good luck to you...