Objective To evaluate the clinical efficacy and safety about CO2 fractional laser combined with Liquid nitrogen cryotherapy for verrcua plantaris. Methods Eighty-five patients with verrcua plantaris were divided into two groups randomly. Forty-five patients in treatment group were treated by CO2 fractional laser combined with liquid nitrogen cryotherapy. Forty patients in control group were treated by liquid nitrogen cryotherapy alone. As a period for 10 days,two groups had been given 3 periods of treatment...