Plantar warts are caused by an infection of the top layer of the skin caused by the Human Papillomavirus (HPV). There are many different strains of the HPV virus, and the strains causing plantar warts are very common. While plantar warts are not malignant and warts can sometimes go away on their own, it could take two years or longer for the wart to disappear without treatment. Plantar warts do not go deeper than your skin, but can look unsightly, and can sometimes cause pain and irritation, so you should consider visiting a foot doctor for treatment solutions.
You will know that you have plantar warts when a wart appears on the bottom of your foot. The growth is usually around the size of a pencil eraser, although sometimes the growth can get bigger. Some people with the HPV virus can actually get small clusters of plantar warts, called mosaic warts.