Warts on the feet are treated naturally with duct tape, states WebMD. People use this treatment by putting a strip of duct tape over the wart for six days. Upon removal of the tape, a pumice stone is used to file the wart; the process is repeated until it's gone.
Herbal remedies such as dandelion, onion and echinacea may also work to naturally heal warts on the feet, according to HowStuffWorks. Freshly picked dandelion, for instance, is used to treat warts by breaking the stem and putting the white milky substance that appears directly onto the wart.
An onion can also be used to treat a wart on the foot, explains HowStuffWorks. To use an onion, people are advised to cut one in half and hollow out one side. That side should be filled with salt and allowed to sit. As the salt draws out moisture from the onion, the liquid can be painted onto the wart throughout the day. To heal the wart from the outside in, individuals may want to boost their immune systems by taking the herbal supplement echinacea. Since warts are caused by a virus, this can be an effective way for the body to take care of the wart with its own immunity powers.