Objective: To observe situation of acne vulgrias which complicated with infection of pityrosporum or demodex fol-liculorum and treatment effect of aiming at pathogens.

• 目的:观察难治性寻常型痤疮合并糠秕孢子菌、螨虫感染情况及加用针对特殊病原体治疗疗效。