Decide whether it really is a verruca. They are easily confused with corns and calluses, which are thickened areas of skin caused by friction. Corns are often seen over hammer toes and where shoes press on the little toe, but they can occur on the sole of the foot just below the toes. Look closely at the verruca, using a mirror and a magnifying glass if possible. Corns and calluses have normal skin lines (like the lines used in fingerprints) over them, but the surface of a verruca is slightly lumpy without lines. If you are not sure, see a chiropodist or ask your doctor.
Do nothing. Just covering the verucca with a plaster and doing nothing might be the best option, for the following reasons.
Without treatment, verrucas almost always disappear within 2 years. Some go within a month or two. Treatments are inconvenient and can be uncomfortable.
It is possible that letting verrucas disappear naturally helps the body to build up immunity, making you less likely to have them in the future.
Most treatments involve rubbing the wart with pumice or an emery board. Some experts think this helps the virus to spread into nearby skin.
You do not need to worry too much about infecting other people in swimming pools and similar places, because the virus is probably already there.