Dr. Pennoyer has successfully treated patients for warts or corns. Warts are caused by a virus living in the skin. Most will last only 9 months, but some can persist longer. The wart virus can live indolent in the surrounding normal skin as well making treatment sometimes difficult. Teenagers will commonly get warts, but they will usually disappear after several months.

Treatments Available

Using OTC productions such as topical salicylic acid products can shrink the warts with persistent use, and in many cases, cause the wart to go away. Please contact the office if the warts are resistant.

Most common warts/ corns can be treated by “painting” with Cantharidin by a Dermatologist. Cantharidin causes a blister to form under the wart or corn. The Dermatologist then can clip away the dead part of the wart or corn on the blister roof in about a week.

Cryotherapy (freezing) is the ideal treatment for adult patients. This treatment is not painful and rarely results in scarring. Several repeated treatments at one to three week intervals may be necessary depending on the severity of your case.

Another kind of treatment called Electrosurgery (burning) is another good alternative to remove your wart or corn. Laser treatment is also available and can also be used for resistant warts that have not responded to other kinds of treatments.


Swift is a new breakthrough treatment for warts.  Pennoyer MD is one of the only local dermatology practices to offer Swift, which uses microwave energy to stimulate an immune response which resolves warts for good (1% recurrence) in 2-3 treatments.  Some of the benefits of Swift include:

  • Fast treatment in minutes
  • No downtime-98% of patients continue normal daily tasks
  • No bandages as this is a non-destructive therapy
  • No smoke or plume during treatment, very clean
  • No at-home care
  • Clinically proven results

To learn more about available treatments: Request an appointment.

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