1. External corrosives

For external application of corn ointment or corn ointment, 10% salicylic acid glacial acetic acid, 30% salicylic acid collodion and crystal ointment can also be used. External corrosives must protect the surrounding skin. You can cut a small hole in the center of the zinc oxide tape, the same size as the skin lesion, and paste it on the skin lesion to expose the skin lesion. In addition, use thin strips of tape to form a rope shape to surround the hole to form a dike. Then apply the dressing and cover it with a large piece of tape, and change the dressing once every 3 to 7 days until it falls off.

2. Physical therapy

Electrocautery, carbon dioxide laser cauterization, exposure to X-ray radiation.

3. Surgical resection.