Use of ultrasound gel to increase efficacy of cryotherapy in treatment of warts

Warts are benign tumors that commonly involve the skin and other epithelial tissues and are caused by human papillomavirus infection. The treatment of warts can difficult, although several treatment modalities are available. There is no single treatment that is 100% effective and different types of treatment may be combined. In recalcitrant warts, treatment modalities include cryotherapy, lasers, intralesional bleomycin, and 5% imiquimod, if the lesions are few.