Purpose: Altered bowel function is a common consequence of anal sphincter-saving surgery in rectal cancer patients, and bowel symptoms influence patients' daily life and psychosocial status. Patients have inadequate professional support because care specialists fail do fully appreciate the impact of the patients' symptoms. In-depth exploration of the individual's experience is essential to improve the quality of patient care. The purpose of this study was to explore the lived experiences of post-operative rectal cancer patients with altered bowel function. Methods: This Husserlian descriptive phenomenological study recruited 16 post-operative rectal cancer patients with altered bowel function. Data was collected through purposive sampling and one-on-one in-depth, semi structured interviews. Narratives were analyzed thematically using Colaizzi's seven-step method. Results: Three themes emerged, namely: "living in the restroom", "never backward", and "rebalancing on a new road". "Living in the restroom" described how patients frequent the restroom due to post-operative physical changes. "Never backward" outlined that such changes disturbed their mood, interrupted their daily activities, and affected their family life. "Rebalancing on a new road" described the patients' coping strategies, which included spiritual reconstruction, a new excrement model, an adjusted lifestyle, and peer support. Conclusions: Post-operative rectal cancer patients with altered bowel function frequent the restroom for prolonged periods, which disturbs their psychosocial status. However, they are forced to develop coping methods by themselves. Specialists can offer effective early post-operative interventions by thoroughly understanding each patient's symptomatic experience, symptom-related interferences, and primary concerns.