Abstract
Aminolevulinic acid-based photodynamic therapy(ALA-PDT)is a safe and effective physical therapy for acne vulgaris that is widely used in clinical practice.To further standardize the clinical application of ALA-PDT in the treatment of acne,we created this updated consensus based on the 2011 version of the consensus on ALA-PDT for the treatment of acne vulgaris.In this document,we summarize the mechanisms of action of ALA-PDT and provide practical standards for patient selection,treatment parameters,administration procedures,and management of adverse reactions.Our aim was to provide guidance and treatment regimens for using ALA-PDT for acne vulgaris in clinical practice.