Clinical meaning
Dame Cicely Saunders introduced the concept of 'total pain' in palliative care, recognizing that suffering at end of life encompasses physical, psychological, social, and spiritual dimensions. Physical pain in terminal illness may result from tumor invasion, nerve compression, bone metastases, visceral distention, and treatment-related causes. Psychological pain includes fear of dying, loss of control, and anticipatory grief. Social pain encompasses family burden, financial concerns, and role loss. Spiritual pain involves existential distress, loss of meaning, and spiritual crisis. The WHO analgesic ladder provides a framework: Step 1 (non-opioid ± adjuvant) for mild pain, Step 2 (weak opioid + non-opioid ± adjuvant) for moderate pain, and Step 3 (strong opioid + non-opioid ± adjuvant) for severe pain. In palliative care, there is no ceiling dose for strong opioids - the dose is titrated until pain is controlled or intolerable side effects occur. Around-the-clock dosing with breakthrough doses available is preferred over as-needed dosing for continuous pain. Adjuvant medications target specific pain types: corticosteroids for bone and visceral pain from edema, bisphosphonates for bone metastases, and anticonvulsants for neuropathic pain.