A nurse is assessing a palliative care patient reporting severe pain. What non-pharmacological intervention should be considered to complement pain management strategies?

Palliative care pain is mediated by complex nociceptive and neuropathic pathways, involving persistent nociceptor activation, central sensitization, and emotional amplification through limbic system involvement, requiring multimodal management that includes both pharmacologic and non-pharmacologic interventions to reduce pain perception and improve quality of life. Rationale: A. Guided imagery therapy reduces pain perception by activating cortical pathways that modulate central pain processing. It decreases sympathetic arousal, reduces anxiety, and enhances endogenous endorphin release, thereby lowering perceived pain intensity. It is an evidence-based adjunct in palliative pain management. B. Strict bed rest increases risks of pressure injury, venous stasis, and deconditioning without directly reducing nociceptive signaling. It may worsen discomfort over time and does not address the neurological perception of pain. Therefore, it is not a beneficial intervention. C. Daily long-distance walking (5 km) is inappropriate in a patient with severe palliative pain. It increases physical strain, metabolic demand, and fatigue, potentially exacerbating pain and reducing comfort. Activity should be individualized and symptom-limited. D. A high-calorie diet may support energy balance and cachexia prevention, but it does not directly modulate pain pathways. While nutritional support is important in palliative care, it is not a non-pharmacological pain control strategy.