Chronic Pain Research: Studies, Evidence & Limitations

Last updated August 23, 2026 · 9 min read

By Tauri Urbanik, research writer and PainApp founder

Start with the evidence map

The most useful question is not “Does mind-body treatment work?” It is: which treatment, for which population, compared with what, on which outcome, and for how long?

Our Brain-Based Chronic Pain Treatments Evidence Map compares six important evidence rows across Pain Reprocessing Therapy, Emotional Awareness and Expression Therapy, CBT, mindfulness meditation, and pain neuroscience education.

Download the evidence map as CSV

The map includes the population, study design, sample or evidence-base size, comparator, finding, limitation, DOI, source URL, and last review date. It is an editorial research aid, not a clinical guideline.

Clinical trials and treatment evidence

The Boulder Back Pain Study

The randomized PRT trial enrolled 151 adults with primary chronic back pain. Participants assigned to PRT received a physician telehealth evaluation plus eight individual therapy sessions over four weeks. Thirty-three of 50 assigned to PRT were pain-free or nearly pain-free after treatment (Ashar et al., JAMA Psychiatry, 2022↗).

The detailed review separates the selected study population, therapist-led protocol, comparator groups, one-year results, five-year follow-up, imaging outcomes, conflicts, and limits on generalization.

Emotional Awareness and Expression Therapy

EAET focuses on emotional awareness, expression, and interpersonal or psychosocial threats that may influence pain. Its evidence is not one number. A fibromyalgia trial found no difference from education on the primary pain-severity outcome and no difference from CBT on the primary or most secondary outcomes, but advantages on some symptoms and pain measures (Lumley et al., PAIN, 2017↗).

A later trial in older veterans with chronic musculoskeletal pain found lower pain severity with EAET than CBT after treatment and at six months. The participants were 92% male, which limits generalization (Yarns et al., JAMA Network Open, 2024↗).

Pain Neuroscience Education

PNE teaches how biological, psychological, and social factors can influence pain. A 2023 umbrella review of 16 systematic reviews found a more favorable pattern when PNE was added to multimodal care, often exercise-based. PNE alone did not show statistically significant overall improvements, and the review reported critically low methodological quality, high overlap, and heterogeneous protocols (Cuenca-Martínez et al., Frontiers in Neuroscience, 2023↗).

Education may be useful. Reading a webpage is not equivalent to receiving an effective treatment.

Techniques and how they relate to the evidence

Somatic Tracking

Somatic tracking involves attending to a tolerable sensation with curiosity and less threat. It was one component of the multi-part, therapist-led PRT protocol. The trial did not isolate somatic tracking or establish its standalone effect.

The guide explains steps, safety boundaries, situations in which attending to a sensation may be inappropriate, and why a sensation changing during attention does not diagnose its cause.

Pain Reprocessing Therapy Exercises

The exercise guide translates the published PRT intervention components into cautious educational practices: personalized evidence, reappraisal, somatic attention, approved movement exposure, work with psychosocial threats, positive emotion, and self-compassion. It also makes clear where self-guided practice differs from the studied protocol.

The Way Out by Alan Gordon

This evidence-bounded book review separates Gordon's accessible explanation and exercises from the claims directly tested in the PRT trial. A book can teach concepts; the published result came from a selected population receiving clinician assessment and experienced therapist support.

Mechanisms, imaging, and diagnostic limits

Central Sensitization: The Science

Central sensitization describes increased responsiveness in central nociceptive pathways. It is a mechanism, not a catch-all diagnosis or proof that tissue and nerve contributors are absent. The review explains terminology, laboratory findings, clinical limits, and overlap with nociplastic pain.

Brain Imaging and Pain

Brain imaging can reveal group-level associations in pain processing and treatment response. It generally cannot tell an individual why they hurt, prove that pain is exclusively “from the brain,” or replace clinical assessment.

MRI Findings Explained

Many spinal imaging findings also appear in people without pain. That makes clinical correlation essential. An imaging finding may be incidental, relevant, or one contributor among several; prevalence in asymptomatic people does not make every finding harmless.

Phantom Limb Pain

Phantom limb pain demonstrates that a real pain experience can occur without tissue in the perceived location. It helps explain pain as a nervous-system output, but it does not prove that an intact person's unexplained pain has the same mechanism.

Historical context

Dr. Sarno's Legacy

John Sarno helped popularize the idea that attention, fear, stress, and emotion can influence persistent pain. His clinical observations were historically influential but were not randomized efficacy trials. The review separates those observations from later nociplastic-pain terminology and modern treatment research.

Our evidence standard

Each priority research page should answer:

1. Who was studied?
2. What exactly was delivered?
3. What was the comparator?
4. Which outcome and time point produced the headline?
5. What did not improve?
6. How much follow-up and replication exist?
7. What conflicts or developer involvement were disclosed?
8. What should not be generalized?

See the editorial policy for authorship, evidence hierarchy, update dates, corrections, composite stories, and PainApp's commercial relationship to this site.

Frequently asked questions

What does research say about brain-based chronic pain treatments?

Results differ by treatment and population. CBT has a broad evidence base with small average effects. PRT produced a large result in one selected primary chronic back-pain trial. EAET has promising but population-specific findings, while mindfulness and pain neuroscience education have lower-certainty or mixed evidence.

What did the Pain Reprocessing Therapy trial find?

In a randomized trial of 151 adults with primary chronic back pain, 33 of the 50 participants assigned to four weeks of therapist-led PRT were pain-free or nearly pain-free after treatment. The result cannot be generalized to every chronic pain condition or self-guided program.

Is pain neuroscience education a treatment by itself?

A 2023 umbrella review found that PNE may improve some outcomes when added to multimodal care, but PNE alone did not show statistically significant overall improvements. Education can support care without being equivalent to treatment completion.

Where can I read the original chronic pain studies?

Every evidence summary in this library links to its original PubMed or full-text record. The downloadable evidence map also includes source URLs and DOIs.

References

1. Ashar YK, Gordon A, Schubiner H, 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;79(1):13-23.DOI: 10.1001/jamapsychiatry.2021.2669
2. Lumley MA, et al. Emotional awareness and expression therapy, cognitive behavioral therapy, and education for fibromyalgia: a cluster-randomized controlled trial. PAIN. 2017;158(12):2354-2363.DOI: 10.1097/j.pain.0000000000001036
3. Yarns BC, et al. Emotional Awareness and Expression Therapy vs Cognitive Behavioral Therapy for Chronic Pain in Older Veterans: A Randomized Clinical Trial. JAMA Network Open. 2024;7(6):e2415842.DOI: 10.1001/jamanetworkopen.2024.15842
4. Williams ACC, Fisher E, Hearn L, Eccleston C. Psychological therapies for the management of chronic pain (excluding headache) in adults. Cochrane Database Syst Rev. 2020;8:CD007407.DOI: 10.1002/14651858.CD007407.pub4
5. Hilton L, et al. Mindfulness Meditation for Chronic Pain: Systematic Review and Meta-analysis. Ann Behav Med. 2017;51(2):199-213.DOI: 10.1007/s12160-016-9844-2
6. Cuenca-Martínez F, et al. Pain neuroscience education in patients with chronic musculoskeletal pain: an umbrella review. Front Neurosci. 2023;17:1272068.DOI: 10.3389/fnins.2023.1272068