Chronic Back Pain — NZ Condition Guide | KiwiMeds

What is Chronic Back Pain?

Back pain is one of the most common reasons New Zealanders see a GP and is the leading cause of work disability. Most acute back pain (lasting less than 6 weeks) resolves on its own. Chronic back pain — lasting more than 3 months — affects around 15–20% of New Zealanders and can be significantly disabling.

Overview

Most chronic back pain (around 85–90%) is “non-specific” — meaning there is no identifiable structural cause such as a disc herniation or fracture. Pain is real and debilitating but results from complex interactions between physical, psychological, and social factors. Red flags requiring urgent investigation include back pain with neurological symptoms (leg weakness, bowel/bladder problems), unexplained weight loss, fever, history of cancer, or pain worse when lying down.

Treatment in New Zealand

The most effective treatments for chronic non-specific back pain are staying active (avoiding bed rest), physiotherapy, cognitive behavioural therapy, and graded exercise. Medications have a limited role — paracetamol, NSAIDs, and muscle relaxants (diazepam — short-term only) provide modest relief. Opioids are not recommended for chronic back pain. Epidural steroid injections and surgery may help specific conditions (disc herniation with radiculopathy, spinal stenosis) but not non-specific back pain. A pain management programme may help people with significant disability.

NZ-Specific Information

ACC funds physiotherapy and other rehabilitation for work-related back injuries. The “Lift Well NZ” and “Back in Action” programmes promote safe lifting and back health. Te Whatu Ora provides pain management services. The NZ guideline for the management of low back pain recommends active rehabilitation over passive treatments.

Frequently Asked Questions

Should I rest with back pain? No — bed rest worsens chronic back pain. Staying as active as possible, with guidance from a physiotherapist, is the most effective approach. Do I need an MRI? Most people with chronic back pain do not need MRI — abnormal findings (disc bulges etc.) are common in pain-free adults and often do not explain symptoms. MRI is needed if red flags are present.

Supplements That May Support Management

⚠️ Important: The supplements listed below have varying levels of clinical evidence. They are not a substitute for prescribed medications and should only be considered as adjunctive support under the guidance of a qualified healthcare professional. Always inform your GP or pharmacist before commencing any supplement, as interactions with prescribed medicines are possible.

• Vitamin D — Vitamin D deficiency is highly prevalent in chronic back pain and is associated with increased pain sensitivity, muscle weakness, and impaired proprioception — all relevant to back pain maintenance. Supplementation in confirmed deficiency has demonstrated improvements in back pain scores and function.
• Magnesium — Magnesium modulates NMDA receptor-mediated central sensitisation, a key mechanism in chronic back pain. Supplementation at 300–500 mg/day may reduce pain sensitisation and support muscle relaxation.
• Palmitoylethanolamide (PEA) — PEA has demonstrated analgesic benefit in neuropathic and musculoskeletal pain conditions including radiculopathy (nerve root pain from disc disease) at 600 mg twice daily with a good safety profile and no dependence risk.
• Curcumin (bioavailable formulations) — Curcumin inhibits NF-κB and COX-2 inflammatory pathways relevant to disc inflammation and facet joint pain. Bioavailability-enhanced formulations at 500–1000 mg/day may provide anti-inflammatory pain relief as an alternative or adjunct to NSAIDs.
• Glucosamine and Chondroitin (for facet joint OA component) — For back pain with a significant osteoarthritic facet joint component, glucosamine sulphate (1500 mg/day) and chondroitin sulphate (1200 mg/day) have modest evidence for reducing inflammatory joint pain, though individual response varies.

Relevant Vaccinations

Individuals living with chronic back pain may benefit from the following vaccinations. Please discuss your vaccination status with your GP or practice nurse, as eligibility and funding through the New Zealand National Immunisation Schedule may apply.

• Influenza (annual) — Viral illness causes immune-mediated pain sensitisation and muscle inflammation that worsens back pain. Annual vaccination reduces this burden.
• Shingles (Shingrix) — Herpes zoster reactivation can present as severe unilateral back pain and post-herpetic neuralgia superimposed on chronic back pain. Shingrix vaccination from age 50 is recommended.
• COVID-19 — Post-COVID musculoskeletal pain and fatigue are common complications. Maintaining vaccination reduces this risk.

Dietary Guidance

Evidence-based dietary modifications play a meaningful role in the management of chronic back pain. The following foods are generally recommended as part of a balanced, condition-appropriate diet. A referral to a registered dietitian may be beneficial for personalised nutritional planning.

• Anti-inflammatory Mediterranean dietary pattern — Dietary inflammation is a modifiable driver of central sensitisation in chronic pain. Mediterranean dietary adherence is associated with lower back pain disability scores in observational studies.
• Oily fish (omega-3 source) — EPA and DHA from dietary fish reduce inflammatory prostaglandin and leukotriene production. Two servings per week recommended.
• Adequate protein (1.2–1.5 g/kg/day) — Maintaining lean muscle mass through adequate protein intake and exercise supports spinal stability and reduces pain from postural muscle weakness.
• Calcium and vitamin D-rich foods — Osteoporotic vertebral fractures are a major cause of back pain. Adequate calcium and vitamin D through diet supports bone health alongside prescribed treatment.
• Limit: excess alcohol, ultra-processed foods, refined sugar — These promote systemic inflammation, disrupt sleep, and contribute to weight gain — all aggravating factors for chronic back pain.

Related Conditions & Medications

Related conditions: Chronic Pain, Osteoporosis. Related medications: Ibuprofen, Paracetamol.