Obstructive lung diseases encompass a group of chronic respiratory conditions characterized by airflow limitation. This category includes chronic obstructive pulmonary disease (COPD), asthma, and several other diseases. It is known that the likelihood of sleep-disordered breathing increases in patients with obstructive lung diseases, and vice versa. Obstructive sleep apnea, the most common sleep-disordered breathing, and COPD mutually influence each other concerning disease occurrence, symp-toms, severity, and prognosis. Moreover, the coexistence of both in Overlap syndrome (OS) demonstrates a worse prognosis compared to each condition separately. Asthma also shares common risk factors with OSA, and each condition affects the se-verity and treatment management of the other. When treating patients with both chronic respiratory diseases and sleep-related breathing disorders, it is crucial not to focus solely on one group of conditions. Sensitively diagnosing both conditions and im-plementing appropriate treatments at the right time is important.
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