MiddletownJournal.com

(HealthDayNews) -- Plantar warts usually develop on the sole of the foot and resemble calluses, according to the American Academy of Orthopaedic Surgeons.

Caused by a viral infection, they actually grow inward due to the weight put on the foot when a person walks.

If you have one or more plantar warts, you may experience severe pain when walking.

Plantar warts are difficult to treat, but success has been achieved with repeated applications of salicylic acid (available over the counter) to soften the overlying callus and expose the infection. Other treatments include injection of the wart with medication, freezing the wart with liquid nitrogen and, rarely, surgery.