At a glance
What it is
Severe pain in cancer patients caused by the tumour itself (invasion, compression, inflammation) or treatment side effects (surgery, chemotherapy, radiation). Intractable pain fails to respond to standard therapies.
Typical signs
Persistent, often progressive pain; may be localised (surgical scar, nerve compression) or diffuse (bone metastases); often accompanied by depression, sleep disturbance and reduced quality of life.
How we treat it
Escalate opioids according to WHO ladder. Add adjuvant medications (anticonvulsants, antidepressants). Interventional pain procedures (blocks, neurolysis, spinal infusions). Palliative care team for holistic support.
What cancer pain is
Cancer-related pain affects 30–50% of patients during active treatment and up to 75% of those with advanced disease. Pain arises from tumour invasion of bone, viscera or nerves; treatment toxicity; infection; or post-treatment complications. Intractable cancer pain is severe enough to substantially impair function and quality of life despite conventional analgesics.
What we see in clinic
30–50%
Of cancer patients experience pain during active treatment
75%
With advanced disease have pain
60–70%
Achieve adequate analgesia with opioids and adjuvants; 30% require interventional procedures for full control
Key facts
How it is treated
WHO analgesic ladder guides escalation. Multimodal therapy (opioids + adjuvants + interventional procedures) is standard for intractable pain.
Pharmacotherapy — WHO ladder
Step 1: mild pain (1–3/10)
- NSAIDs (aspirin, ibuprofen, naproxen)
- Paracetamol
- Consider adjuvants: anticonvulsants, antidepressants
Pharmacotherapy — WHO ladder
Step 2: moderate pain (4–6/10)
- Weak opioids (codeine, tramadol) ± NSAIDs
- Adjuvant medications as above
Pharmacotherapy — WHO ladder
Step 3: severe pain (7–10/10)
- Strong opioids (morphine, fentanyl, oxycodone) — no ceiling dose
- Extended-release formulations for background pain
- Short-acting (breakthrough) formulations available
- Adjuvants: gabapentin, pregabalin, tricyclics, steroids
Interventional pain procedures
Intractable pain despite maximal pharmacotherapy
- Regional nerve blocks (peripheral and plexus blocks)
- Spinal/epidural infusions (continuous opioid ± local anaesthetic)
- Neurolytic procedures (alcohol or phenol injection) for life-threatening pain in terminal illness
- Dorsal root entry zone (DREZ) lesioning for neuropathic cancer pain
Palliative care is NOT end-of-life care — it is concurrent with curative treatment and focuses on symptom management and quality of life.
Related reading
Fibromyalgia and myofascial pain
Widespread muscle pain that routine scans don't explain. Most of it comes from muscle and fascia, and is treatable once the source is found.
Back pain
Most back pain is mechanical and settles in weeks. The first visit identifies the few cases that need imaging, injections or surgery, without over-treating.
Book a consultation
The secretary schedules first appointments during clinic hours; please have prior imaging, operative notes and a current medication list available at the time of the call.
This page provides general information about cancer-related intractable pain and is not a substitute for individual medical assessment. If your symptoms are severe or worsening, contact a clinician promptly.