Pain Crisis

Pain crisis is severe, uncontrolled pain that requires prompt parenteral analgesia, frequent reassessment, and a search for the cause. It is a clinical state, not a pain-score cutoff: a patient with opioid tolerance, delirium, communication difficulty, or cognitive impairment may have a serious crisis without reporting a particular numerical score. Relief and investigation proceed in parallel. Use an immediate-release opioid that can be moved quickly toward effect, while checking ventilation, sedation, previous opioid exposure, interacting substances, renal and hepatic function, and red flags for a reversible emergency. Once the crisis settles, the opioid actually required becomes the evidence for rebuilding scheduled and breakthrough treatment. Palliative care or an acute pain service should be involved early when repeated titration, opioid rotation, infusion therapy, or complex disease is present. Pain assessment should remain person- and family-centred and interprofessional, consistent with the Registered Nurses' Association of Ontario's 2025 pain guideline. The target is not simply a lower number; it is meaningful relief with preserved alertness, ventilation, function, and safety.