A plantar wart or verruca, can commonly be mistaken for a callus or corn. Plantar warts are due to an infection by the human papaloma virus which is also responsible for warts in other areas of the body.
The main difference with a plantar wart is that they tend to “grow in” rather that grow out so can be more painful and harder to treat.
Warts are unpredictable and can disappear but if left untreated may also be transmitted to other people, spread to other areas or become larger.
Treatments consist of either chemical cautery, freezing or surgical excision.