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The Hidden Causesof Chronic Pain

Research Library

The papers behind the writing

We cite primary sources, not press releases. This page collects our research explainers and the full citation list used across the site, so you can check our work.

Research explained

EstablishedSciatica

Sciatica: Realistic Recovery Timelines

Most lumbar radicular pain improves substantially within twelve weeks. Knowing the shape of that curve changes how the middle of it feels.

JOJulian Okafor9 min read

How we grade what we read

Established Evidence
Supported by multiple high-quality trials, systematic reviews, or broad scientific consensus.
Emerging Research
Early but credible findings — small trials, mechanistic studies, or replication still in progress.
Clinical Observation
Patterns widely reported by experienced clinicians that have not yet been formally tested at scale.
Debated Perspective
Credible researchers disagree. We present the strongest case on each side rather than picking a winner.

Full citation list

  1. Brinjikji W, et al. Systematic literature review of imaging features of spinal degeneration in asymptomatic populations. American Journal of Neuroradiology, 2015

    Cited in: Why Your MRI Does Not Explain Your Back Pain

  2. Webster BS, Cifuentes M. Relationship of early magnetic resonance imaging for work-related acute low back pain with disability and medical utilization outcomes. Journal of Occupational and Environmental Medicine, 2010

    Cited in: Why Your MRI Does Not Explain Your Back Pain

  3. Foster NE, et al. Prevention and treatment of low back pain: evidence, challenges, and promising directions. The Lancet, 2018

    Cited in: Why Your MRI Does Not Explain Your Back Pain

  4. Woolf CJ. Central sensitization: implications for the diagnosis and treatment of pain. Pain, 2011

    Cited in: Central Sensitization, Explained Without Jargon

  5. Kosek E, et al. Chronic nociplastic pain affecting the musculoskeletal system: clinical criteria and grading system. Pain, 2021

    Cited in: Central Sensitization, Explained Without Jargon

  6. Nijs J, et al. Nociplastic pain criteria or recognition of central sensitization? Physical Therapy, 2021

    Cited in: Central Sensitization, Explained Without Jargon

  7. Finan PH, Goodin BR, Smith MT. The association of sleep and pain: an update and a path forward. The Journal of Pain, 2013

    Cited in: Sleep Is Not a Side Issue in Chronic Pain

  8. Smith MT, et al. The effects of sleep deprivation on pain inhibition and spontaneous pain in women. Sleep, 2007

    Cited in: Sleep Is Not a Side Issue in Chronic Pain

  9. Tang NKY, et al. Cognitive behavioural therapy for insomnia comorbid with chronic pain: a randomised controlled trial. Sleep, 2015

    Cited in: Sleep Is Not a Side Issue in Chronic Pain

  10. Hannibal KE, Bishop MD. Chronic stress, cortisol dysfunction, and pain: a psychoneuroendocrine rationale for stress management in pain rehabilitation. Physical Therapy, 2014

    Cited in: How Sustained Stress Rewrites Pain Thresholds

  11. Slavich GM, Irwin MR. From stress to inflammation and major depressive disorder: a social signal transduction theory of depression. Psychological Bulletin, 2014

    Cited in: How Sustained Stress Rewrites Pain Thresholds

  12. Afifi TO, et al. Child maltreatment and physical health conditions: a population-based study. Child Abuse & Neglect, 2016

    Cited in: Adversity, Trauma, and Persistent Pain: What the Data Support

  13. Nelson S, et al. Adverse childhood experiences and chronic pain among children and adolescents: a systematic review. The Clinical Journal of Pain, 2017

    Cited in: Adversity, Trauma, and Persistent Pain: What the Data Support

  14. Ashar YK, et al. Effect of pain reprocessing therapy vs placebo and usual care for patients with chronic back pain: a randomized clinical trial. JAMA Psychiatry, 2022

    Cited in: Adversity, Trauma, and Persistent Pain: What the Data Support

  15. Wolfe F, et al. 2016 revisions to the 2010/2011 fibromyalgia diagnostic criteria. Seminars in Arthritis and Rheumatism, 2016

    Cited in: Fibromyalgia: What We Know, What We Suspect, What We Don't

  16. Clauw DJ. Fibromyalgia: a clinical review. JAMA, 2014

    Cited in: Fibromyalgia: What We Know, What We Suspect, What We Don't

  17. Goebel A, et al. Passive transfer of fibromyalgia symptoms from patients to mice. Journal of Clinical Investigation, 2021

    Cited in: Fibromyalgia: What We Know, What We Suspect, What We Don't

  18. Vlaeyen JWS, Linton SJ. Fear-avoidance and its consequences in chronic musculoskeletal pain: a state of the art. Pain, 2000

    Cited in: Graded Exposure: The Least Exciting Treatment That Keeps Working

  19. Lopez-de-Uralde-Villanueva I, et al. A systematic review and meta-analysis on the effectiveness of graded activity and graded exposure for chronic nonspecific low back pain. Pain Medicine, 2016

    Cited in: Graded Exposure: The Least Exciting Treatment That Keeps Working

  20. Peul WC, et al. Surgery versus prolonged conservative treatment for sciatica. New England Journal of Medicine, 2007

    Cited in: Sciatica: Realistic Recovery Timelines

  21. Chiu CC, et al. The probability of spontaneous regression of lumbar herniated disc: a systematic review. Clinical Rehabilitation, 2015

    Cited in: Sciatica: Realistic Recovery Timelines

  22. Engeler D, et al. EAU Guidelines on Chronic Pelvic Pain. European Association of Urology, 2023

    Cited in: Persistent Pelvic Pain and the Guarding Nobody Checks

  23. Fitzgerald MP, et al. Randomized multicenter clinical trial of myofascial physical therapy in women with interstitial cystitis/painful bladder syndrome. The Journal of Urology, 2012

    Cited in: Persistent Pelvic Pain and the Guarding Nobody Checks

  24. Richards KV, et al. Neck posture clusters and their association with biopsychosocial factors and neck pain in Australian adolescents. Physical Therapy, 2016

    Cited in: The Posture Myth and What Actually Predicts Neck Pain

  25. Damasceno GM, et al. Text neck and neck pain in 18-21-year-old young adults. European Spine Journal, 2018

    Cited in: The Posture Myth and What Actually Predicts Neck Pain

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