Underarm filiform warts are caused by human papillomavirus infection and can be removed by medication, physical therapy, or surgery. 1. medication: axillary filiform warts will cause the appearance of thin and soft filiform protrusions on the skin, usually alone, the color may be skin color or gray-brown, usually no obvious clinical symptoms, if you want to remove the axillary filiform warts, you can use salicylic acid ointment under the guidance of the doctor, fluorouracil ointment ointment and other ointment treatment, can make the warts gradually fall off. 2. physical therapy: patients can also choose physical therapy, such as cryotherapy, laser therapy, etc., can be directly on the armpit warts tissue, so that the warts tissue cells quickly necrosis and then fall off, and generally will not cause serious damage to the normal skin tissue, but also effective in preventing recurrence. 3. Surgery: If the size of the underarm filiform warts is large, you can directly do wart excision surgery, the surgery needs to be injected in the local anesthesia, and then use the surgical blade to remove the warts on the skin. The patient needs to keep the armpit clean and clean, not to scratch the warts excessively.