Obstructive Sleep Apnea-Hypopnea Syndrome(OSAHS)and asthma are two prevalent chronic respiratory diseases.Recent research has revealed that OSAHS not only shares several common risk factors with asthma but also exhibits a high comorbidity rate with it.This mutual interaction complicates the course of both diseases and increases complexity to clinical diagnosis and treatment.This review aims to provide a comprehensive summary and analysis,from an epidemiological and pathophysiological perspective,of the research progress and challenges concerning the OSAHS comorbided with asthma,particularly in severe asthma.