发光二极管（LED）是一种将电能转化为光能的半导体电子元件。随着LED技术的不断升级，其应用范围也从传统的照明领域延伸扩大。近年来，LED在临床应用及基础试验研究中越来越受到人们的重视，尤其是LED在皮肤病、关节炎、骨质疏松、伤口愈合与修复、抗感染和免疫调节等方面的研究。本文将主要对LED红光在多种临床疾病中的研究和应用进行综述。

Lightemitting diode (LED)is a semiconductor material that converts electrical energy into light energy. With the constant upgrading of LED technology, its application range is also extended from the traditional lighting field. In recent years, LED has received more and more attention in clinical application and experimental study, especially in the areas of  skin diseases, arthritis, osteoporosis, wound healing and repair, antiinfection and immune regulation. This paper mainly reviews the study and application of LED red light in different clinical diseases.