HPV infection	First-line therapy	Second-line therapy	Third-line therapy
Common warts(Verruca vulgaris)	Salicylic acid, cryotherapy	Cantharidin*	Bleomycin (Blenoxane), intralesional immunotherapy, pulsed dye laser therapy
Flat warts(Verruca plana)	Salicylic acid, imiquimod (Aldara)	Cryotherapy, retinoids	Intralesional immunotherapy, pulsed dye laser therapy
Plantar warts(Verruca plantaris)	Salicylic acid	Cryotherapy, intralesional immunotherapy, pulsed dye laser therapy	Bleomycin, surgical excision