Topical formic acid puncture technique for the treatment of common warts.

Background: Warts are a common chronic skin disorder that can be cosmetically disfiguring and, depending on the location, cause inhibition of function. The presence of dozens of topical and systemic treatments for warts is a testament to the lack of a rapid, simple, uniformly effective, inexpensive, nonscarring, and painless treatment.

Aim: The purpose of this study was to determine the efficacy and safety of 85% formic acid application, an inexpensive therapy, for the treatment of warts.