We see this in athletes, like the cramps an athlete gets or in the elderly people who get night cramps. The usual and customary treatment aims at a working medication like quinine or time-released quinine. Plantar warts are caused by a virus, usually of the papovirus group. They live within the skin layers. They are the same disease.
Treatment usually depends on where the verruca is.
If on a non-weight bearing area, the skin usually allows a multitude of treatment regimes. If this verruca or papilloma occurs on the plantar surface where the skin possesses a keratin layer, treatment becomes much more difficult. This keratin layer usually makes OTC preparations quite ineffective. Under these circumstances, they should be treated professionally. I use a carbon dioxide laser.