The first of these is a wart on the foot, generally known as a plantar wart, which is caused by human papillomavirus infection, contagious, can be treated with the following methods: 1, if the number of warts is small, relatively small, local anesthesia with carbon dioxide laser treatment. 2, if the number of warts is large, warts can be treated with liquid nitrogen freezing, generally to be treated several times to heal. 3, topical drug treatment