在安眠藥普遍有效且安全的時代中，創傷後的失眠者為何而苦？本文從海德格（Heidegger）與列維納斯（Lévinas）的現象學出發，以空間、時間、意義網絡與他者視域延伸還原失眠者的生活體驗，並穿透創傷後失眠者由受苦至受困之本質結構。伴隨創傷而來的此在不在此與時空交錯現象複雜，失眠者以簡化、裂化與幻化的方式試圖調頻，卻封閉了解套的出口，最終形成層層環繞無法脫離的困局。終章以列維納斯之感受性出發，在清醒與俯臥中，重新連結整合裂解後的自我，洞悉創傷後失眠的解方。清醒作為創傷後失眠者的脫困之道，不僅歸還受苦者經驗主體的位置，也提醒醫療人員、諮商與臨床工作者擴充傳統醫療診治與問題解決之觀點。

Despite the effectiveness of sleep aids, many people still suffer from post-traumatic insomnia. This article untangles the sleepless phenomenon through space, time, meaning and alterity horizon, to better understand the daytime and nocturnal misery of insomniacs. Constant battles and defeats with thrownness, insomniacs grasp hypervigilance-avoidance, disassociation, and re-experiences, resulting in an absentee looping trajectory. The postlude of this study proposed awakening as the hindsight cure, reconnecting the split self. Medical staff, counselors and clinicians can expand the traditional medical diagnosis, treatments and problem-solving perspectives.