Corns do not usually have black roots, while plantar warts do. Plantar warts can be removed by localized treatment, cryotherapy, and laser treatment. 1. Local treatment: local treatment includes topical medications and injections. Topical medications can use salicylic acid, combined with 5-fluorouracil, onychotoxin or zanthoxin to destroy the warts and achieve the effect of removing plantar warts. Injections can be made by injecting bleomycin into the root of the warts to achieve a good therapeutic effect. 2. cryotherapy: cryotherapy for plantar warts is mainly through the use of liquid nitrogen generated by the low temperature, resulting in necrosis of the skin lesions, in order to achieve the effect of treatment, and after the treatment, the patient should also pay more attention to the care of the skin at the wound, in order to prevent infection. 3. laser treatment: commonly used CO2 laser or pulsed dye laser to treat plantar warts, the advantage lies in the high efficiency and convenience, the use of laser photothermal principle, destruction of skin lesions in the tissue, to remove the purpose of plantar warts.