Abstract： Telogen effluvium is the most common type of hair loss after coronavirus disease 2019.This review summarizes the research progress in associations between coronavirus disease 2019 and telogen effluvium,as well as pathogenesis,diagnosis and treatment of telogen effluvium secondary to coronavirus disease 2019.Sharply increased stress,the body's immune response,medications,and exacerbation of underlying diseases may be the precipitating factors for telogen effluvium secondary to coronavirus disease 2019.