Foot warts often occur on the stressed part of the sole of the foot and are a special type of common wart, also known as plantar warts. For plantar warts, topical medications such as imiquimod or ghost toxin can be used, but they are slow to work and require long-term application for several months. The main treatment for plantar warts is localized and is clinically treated with liquid nitrogen freezing. The plantar warts are usually multiple and require several times of liquid nitrogen freezing to remove the warts well. For patients with plantar warts, it is advisable to actively treat them when the rash is relatively small and the lesions are small, so as to avoid the increase in the size of the warts as well as the increase in the number of warts, which causes pain to the patient. The actual topical medication Miquimod or ghost toxin, which needs to be applied for a long course of treatment, is sometimes difficult for patients to adhere to, so it is recommended that the plantar warts be treated with liquid nitrogen freezing.