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In page Obstructive sleep apnea:

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Untreated OSA also leads to a decreased quality of life, difficulties in social functioning,[1] occupational problems and accidents[2] and a greatly increased rate of vehicle accidents.[3][1][4] Those serious outcomes of OSA are mostly related to the excessive daytime sleepiness resulting from the sleep fragmentation and highlight the need to provide the patients with appropriate treatment.[1] Effective treatment majorly improves those adverse consequences, including quality of life.[1] OSA patients also frequently reports pain disorders such as headache or fibromyalgia, OSA patients showing an increased pain intensity alongside a decreased pain tolerance.[4]