雄激素性脱发和斑秃是临床中较常见的脱发类型。近年来，激光技术蓬勃发展，点阵激光 治疗脱发的参数设置及安全性愈发引起学者关注，目前的经验性治疗已取得一定的疗效。点阵激光既可 改变皮肤组织的微环境，激活毛囊干细胞，促进毛发生长，又可破坏皮肤的角质层屏障，加速外用药物的 吸收，在非手术治疗脱发领域颇具前景。本文将从点阵激光的分类、作用原理、治疗雄激素性脱发和斑秃 的临床应用及相关不良反应进行简要综述。

Androgenetic alopecia and alopecia areata are common types of alopecia in clinic. In recent years，laser technology has been developed rapidly，of which the parameter setting and safety of fractional laser therapy for alopecia has attracted more and more attention. Current clinical trials have achieved certain results. Fractional laser can not only change the microenvironment of skin tissue，activate hair follicle stem cells，promote hair growth，but also open the skin barrier and accelerate the absorption of topical drugs. Thus，fractional laser therapy has a promising prospect in non⁃surgical treatment of alopecia. This article reviews the classification，prin⁃ ciple，clinical application and related adverse reactions of fractional laser in the treatment of androgenetic alopecia and alopecia areata.