Background: Cutaneous warts are the benign epithelial proliferative lesions caused by human papilloma virus infection. Warts are successfully treated with Siddha drugs having chemical cauterization mechanism. We report a case on filiform warts treated effectively using Kaalaani kalimpu. Cases: One filiform warts on face was treated with three doses of Kaalaani kalimpu cream application, followed by application of Kaya thirumeni ennai. In three application, the warts fall off and Kaya thirumeni ennai effectively healsthe ulcer without scar. Conclusion: Kaalaani kalimpu is effective in removal of filiform warts, but further investigations in controlled studies should be carried out to create evidence.