Low back pain is an issue so prevalent that it feels like a rite of passage for many adults. According to Dr. Joseph Liao, a board-certified anesthesiologist and pain management interest in, up to 80% of people will experience low back pain at some point in their lives, making it one of the most common health challenges globally. In a recent talk, Dr. Liao delved into the many facets of low back pain, from its causes to evidence-based treatments, offering invaluable insights and solutions for navigating this complex condition.
This article distils the key points of his presentation, breaking down the causes of low back pain, its multifactorial nature, and the latest therapeutic advancements.
Understanding Low Back Pain: Why It’s Not a Matter of "If", but "When"
Dr. Liao emphasised that low back pain is almost inevitable, especially as the human lifespan continues to increase. He highlighted an intriguing concept: "We are outliving our hardware." While advances in healthcare have extended life expectancy significantly, our musculoskeletal system, particularly the spine, hasn’t evolved to match this longevity. Over time, natural degeneration of spinal structures leads to pain and dysfunction, but not everyone with degeneration experiences pain.
Key Statistics on Chronic Pain
- 1 in 4 adults in the US experiences chronic pain, surpassing the prevalence of conditions like diabetes and hypertension.
- 40% of all chronic pain originates in the low back, making it the most common site for pain.
- By the age of 50, up to 80% of people show spinal degeneration on imaging, regardless of whether they feel pain.
This indicates that low back pain is multifactorial and not solely dependent on imaging findings, underscoring the complexity of diagnosing and treating the condition.
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Causes of Low Back Pain: A Multilayered Problem
Dr. Liao explained that low back pain could stem from a variety of factors involving bones, muscles, nerves, and soft tissues. To understand this, it’s helpful to break the spine into three sections:
- Anterior (front): Includes vertebral bodies and discs, which absorb shock and bear weight.
- Middle (central): Houses the spinal cord and nerve roots.
- Posterior (back): Comprised of ligaments, joints, and muscles that stabilise and mobilise the spine.
Common Contributing Factors
- Disc Degeneration: Loss of height and elasticity in intervertebral discs leads to wear-and-tear arthritis and inflammation.
- Facet Joint Dysfunction: These small stabilising joints in the back of the spine can develop arthritis, causing pain with movement.
- Muscle Weakness and Atrophy: Over time, chronic pain can cause muscles like the multifidus to weaken, leading to misalignment and further strain.
- Nerve Impingement: Compression or irritation of nerve roots can cause radiating pain down the legs (sciatica).
It’s important to note that pain perception is subjective and influenced by emotional and psychological factors. Chronic low back pain doesn’t always correlate with visible structural issues on imaging but can result from central nervous system changes.
The Evolution of Pain: Acute vs. Chronic
Dr. Liao distinguished between acute low back pain (lasting less than 3 months) and chronic low back pain (persists beyond 3 months). The key difference lies in the body’s healing timeline and the central nervous system’s response.
- Acute Pain: Often linked to an identifiable injury or condition, with recovery typically occurring within weeks.
- Chronic Pain: The result of central sensitisation, where the spinal cord and brain amplify pain signals, even if the original injury has healed.
This phenomenon underscores the need for treatment plans that address both physical and neurological components of chronic pain.
Treatment Options: A Tailored, Multidisciplinary Approach
Dr. Liao advocated for a four-pronged approach to managing low back pain:
1. Physical Therapy: The Foundation of Recovery
Physical therapy (PT) plays a critical role in building strength, improving flexibility, and stabilising the spine. A structured PT program can help mitigate the effects of spinal misalignment and muscle atrophy.
- Goal: Re-engage spinal anatomy, strengthen adjacent muscles, and prevent future injury.
- Long-Term Benefits: After completing guided PT, patients can transition to home-based exercises to maintain results.
2. Medications
Medications can provide short-term symptom relief but do not address underlying biomechanical issues. Options include:
- Anti-inflammatory drugs to reduce swelling and pain.
- Nerve-modulating medications (e.g., antidepressants) to manage pain processed centrally in the brain.
Dr. Liao emphasised that the risks and benefits of medications should always be carefully weighed, especially for long-term use.
3. Injections and Ablations
When conservative measures fail, targeted interventions can help:
- Epidural steroid injections: Reduce inflammation around nerve roots.
- Radiofrequency Ablation (RFA): Temporarily deactivates pain-transmitting nerves, providing relief for 6–12 months before the nerve regrows.
4. Advanced Therapies: The Cutting Edge of Pain Management
Neuromodulation
Using implantable devices, neuromodulation stimulates nerves to "dial down" pain signals. This innovative treatment is based on the Gate Control Theory, which posits that introducing non-painful stimuli (e.g., a buzzing sensation) can override pain signals.
Dr. Liao highlighted two promising advancements:
- Spinal Cord Stimulation: Targets chronic pain by disrupting pain transmission to the brain.
- Restorative Neuromodulation: Re-engages atrophied muscles, promoting improved alignment and function.
Minimally Invasive Spine (MIS) Procedures
These outpatient interventions address specific pain generators with minimal disruption to surrounding tissues:
- Basivertebral Nerve Ablation: Targets nerves transmitting disc-related pain.
- Percutaneous Lumbar Decompression: Removes excess ligament tissue to relieve spinal stenosis.
- Sacroiliac (SI) Joint Fusion: Stabilises the SI joint, a common source of lower back pain.
The Broader Impact of Chronic Pain
Beyond the physical discomfort, chronic low back pain can profoundly affect mental health, sleep quality, and overall quality of life. Psychological therapies, such as reframing techniques and cognitive behavioural therapy, can help patients retrain their brains to respond differently to pain.
Dr. Liao explained how central sensitisation amplifies pain perception, leading to a vicious cycle of reduced activity and increased discomfort. Breaking this cycle through targeted intervention and guided physical therapy is key to improving functionality and quality of life.
Key Takeaways
- Low back pain is inevitable for most people. Up to 80% of adults will experience it during their lifetime.
- Not all degeneration equals pain. Spinal changes seen on imaging don’t always correlate with symptoms, highlighting the importance of personalised care.
- Treatment must be tailored. A multidisciplinary approach, including physical therapy, medication, injections, and advanced therapies, is most effective.
- Central sensitisation is real. Chronic pain often involves changes in the nervous system, making early intervention essential.
- Neuromodulation and MIS procedures are game-changers. These cutting-edge treatments offer targeted relief with minimal recovery time.
- Prevention starts early. Exercise-based therapy and proper posture can slow down degenerative changes, reducing the risk of chronic pain later in life.
Moving Forward
Managing low back pain requires a delicate balance of addressing symptoms, enhancing functionality, and preventing further degeneration. Dr. Liao’s talk shed light on the importance of evidence-based, multidisciplinary treatment strategies tailored to each individual’s unique needs.
Whether you’re dealing with acute discomfort or chronic pain, the message is clear: don’t ignore the warning signs. Early intervention and a proactive approach can help you reclaim your mobility, reduce pain, and live a healthier, more functional life.
Source: "Back on Track: Managing Low Back Pain" – Stanford Health Care, YouTube, May 30, 2025 – https://www.youtube.com/watch?v=YvMtiiRBfok
