The Biopsychosocial Model of Pain: Understanding Pain in Context

Pain is a real and personal experience. Injury, inflammation, disease or nerve dysfunction may be central to it, but pain is not a simple measure of tissue damage. The intensity and impact of pain can also be influenced by how the nervous system processes information, what a person understands and expects, their emotional state, previous experiences, relationships, work, culture and access to healthcare.

The biopsychosocial model provides a structured way of considering these influences together. It broadens the clinical question from “Which structure is damaged?” to “What biological, psychological and social processes are contributing to this person’s pain and disability, and which of them are most important to address now?”[1–5]

Importantly, this approach does not replace medical assessment, investigation or disease-specific treatment. It also does not imply that pain is imagined, exaggerated or “all in the mind”. The International Association for the Study of Pain recognises that pain is always personal and is influenced, to varying degrees, by biological, psychological and social factors.[2,3]

WHAT IS THE BIOPSYCHOSOCIAL MODEL?

The biopsychosocial model was formally described in medicine by psychiatrist George Engel in 1977. Engel argued that a purely biomedical model—focused mainly on disease, injury and bodily pathology—could not fully explain how illness is experienced or why people with apparently similar medical conditions may have very different levels of symptoms, distress and disability.[1]

Applied to pain, the model recognises that biological processes, thoughts and emotions, behaviour, relationships and the wider social environment can interact with one another over time. Their relative importance varies between people and may also change during the course of the same person’s condition.[2–6]

The biopsychosocial model is therefore neither a diagnosis nor a treatment by itself. It is a framework for:

• understanding the person’s pain in context;

• developing a coherent explanation or formulation;

• identifying potential treatment priorities;

• coordinating different forms of care when necessary; and

• reviewing whether the plan is helping.

Modern critiques have noted that the model becomes less useful when it is reduced to a checklist of separate “bio”, “psycho” and “social” factors. Its greater value comes from considering how particular factors may interact and which relationships are most relevant in an individual case.[6,7]

THREE INTERACTING LENSES

BIOLOGICAL FACTORS

Biological factors include the medical condition and the bodily processes contributing to pain. Depending on the person, these may include:

• tissue injury or disease;

• inflammation;

• arthritis or other structural changes;

• nerve injury or dysfunction;

• altered processing of sensory information within the nervous system;

• genetics and other health conditions;

• medication effects; and

• changes in strength, mobility and physical capacity.

These factors remain important even when psychological or social difficulties are also present. A biopsychosocial assessment should never be used as a reason to overlook a new illness, progressive neurological problem, inflammatory disorder, fracture, infection, cancer or another condition requiring specific investigation and treatment.

Medical imaging can be valuable for diagnosis and treatment planning, but a scan does not directly measure pain. Some degenerative findings are common in people without symptoms, particularly as people age. Imaging therefore needs to be interpreted alongside the history, examination and broader clinical context rather than treated as either a complete explanation or as irrelevant.[4,9]

PSYCHOLOGICAL FACTORS

In this context, “psychological” refers to ordinary functions of the brain and mind, including attention, memory, learning, expectations, emotions, beliefs and coping. It does not necessarily mean that a person has a mental illness or that their experience of or response to pain is a psychiatric or psychological problem.

Examples include:

• how threatening or damaging the pain is believed to be;

• where attention is directed when symptoms occur;

• expectations about recovery or treatment;

• fear of movement or reinjury;

• confidence in managing symptoms;

• patterns of activity, avoidance or overactivity;

• emotional distress, depression or anxiety; and

• the effects of previous experiences, including trauma.

These factors may contribute to pain-related distress or disability, but they may also develop because of persistent pain. For example, depression may make pain more difficult to manage, while prolonged pain, loss of independence and inability to work may themselves lead to depression. The relationship is often reciprocal rather than a simple one-way chain of cause and effect.[4,5]

Psychological treatment should therefore not be presented as treatment for “imaginary pain”. Where relevant, it may help a person respond differently to pain, reduce distress, increase confidence, address fear and avoidance, and participate more fully in rehabilitation or valued activities. Mood, trauma, cognition and sleep are considered in greater detail in other articles in this series.

SOCIAL AND ENVIRONMENTAL FACTORS

Pain occurs within a person’s relationships, community and wider social environment. Social factors may be supportive and protective, or they may add to the burden of pain.

Relevant influences can include:

• family relationships and caring responsibilities;

• social connection or isolation;

• workplace demands, flexibility and support;

• job security and access to suitable duties;

• income, housing and financial strain;

• cultural understandings of pain and illness;

• language, discrimination and health inequity;

• access to appropriate healthcare;

• conflicting or threatening medical messages; and

• interactions with insurance, compensation or legal systems.

Social influences extend beyond the immediate family. Contemporary pain research also considers community resources, healthcare systems, economic circumstances, cultural expectations and public policies that affect who develops pain, who can obtain care and how pain affects participation in society.[8]

Compensation and legal processes require particularly careful interpretation. Compensation-related factors have been associated with poorer outcomes in some musculoskeletal injury studies, but findings are mixed and an association does not establish that compensation causes persistent pain. Reverse causation is also possible: people with more serious injuries, greater disability or slower recovery may be more likely to require compensation or legal assistance.

These findings should never be used to assume that a claimant lacks motivation, is exaggerating symptoms or has adopted an inappropriate “patient identity”. The more constructive approach is to identify potentially modifiable difficulties—such as delayed treatment, uncertainty, repeated assessments, disrupted work, poor communication or an adversarial process—without blaming the injured person.[13]

THE THREE DOMAINS ARE NOT SEPARATE BOXES

The biological, psychological and social categories are useful labels, but the boundaries between them are not rigid.

For example, disrupted sleep has physiological effects, may be intensified by worry, and can also arise from shift work, caregiving responsibilities or an unsuitable living environment. Work absence may affect income and social connection, while also reducing routine and physical activity. A frightening medical explanation can alter expectations, attention and movement even though the original problem began with a genuine injury.

The point is not to decide whether pain is “physical” or “psychological”. Pain is an embodied experience in which processes occurring at different levels can influence one another.

HOW FACTORS CAN INTERACT

Consider a person who develops persistent back pain after a workplace injury. The initial injury and continuing sensitivity make bending painful. Concern about further damage leads the person to avoid movement. Time away from work disrupts routine, social contact and income, while uncertainty about the claim increases distress. As activity falls, physical capacity may decline, making ordinary tasks more demanding and reinforcing the belief that the back remains seriously damaged.

This example does not mean that fear, inactivity or compensation “caused” the original pain. It illustrates how the consequences of a genuine injury can begin to interact, creating additional treatment targets.

The pattern will not be the same for everyone. In another person, active inflammatory disease, progressive nerve compression or another biological condition may remain the dominant driver and require targeted medical treatment. The model does not require equal weighting of the three domains.

WHAT THE BIOPSYCHOSOCIAL MODEL DOES NOT MEAN

Used appropriately, the model does NOT mean that:

• pain without pathology on a scan is not real;

• emotional distress proves that pain is psychological;

• structural pathology or biological treatment is unimportant;

• every person has significant problems in all three domains;

• every patient requires a psychologist or multidisciplinary pain program;

• improving coping removes the need for appropriate medical care;

• the person is responsible for causing or maintaining their pain; or

• addressing biopsychosocial factors will necessarily eliminate pain.

It should also not be selectively applied only when clinicians cannot find a satisfactory biomedical explanation. People with cancer, inflammatory arthritis, neuropathic pain, postoperative pain and clearly demonstrated structural disease still experience pain within a psychological and social context.

HOW THE MODEL GUIDES PAIN MANAGEMENT

Treatment should follow the individual formulation rather than a standard package. Some people may need one clearly targeted intervention. Others—particularly those with complex pain, significant disability or several interacting barriers—may benefit from coordinated care involving more than one discipline.

Depending on the diagnosis and goals, care might include:

• Medical and biological treatment: management of the underlying disease, medication where appropriate, interventional procedures or surgery when clinically indicated, and treatment of relevant health conditions.

• Physical and functional rehabilitation: individually prescribed supervised exercise, physiotherapy, occupational therapy, pacing, graded exposure to activity and restoration of physical capacity.

• Psychological support: pain education, cognitive-behavioural therapy, acceptance-based approaches, treatment of depression, anxiety or trauma, and strategies addressing fear or low confidence.

• Social and occupational intervention: workplace communication, suitable duties, vocational rehabilitation, assistance with caring roles and coordination with insurers or other services where appropriate.

A biopsychosocial approach does not necessarily mean more appointments or more clinicians. It can also mean that one clinician conducts a broad assessment, establishes priorities and involves other practitioners only where their input is likely to add value. Guidelines similarly recommend person-centred assessment and care planning rather than assuming that everyone with chronic pain needs the same intervention.[10,14]

Evidence for particular treatment combinations is condition-specific. In chronic low back pain, multidisciplinary biopsychosocial rehabilitation produces modest average improvements in pain and disability compared with usual care, while effects on work outcomes vary according to the comparison treatment and program. Psychological therapies such as cognitive-behavioural therapy also have small or very small average effects on pain, disability and distress, although individual responses differ.[11,12]

These findings support offering relevant treatments with realistic expectations. They do not justify claiming that biopsychosocial care is universally superior, that every person requires an intensive program or that a particular approach will provide substantial pain relief.[11,12]

WHAT DOES SUCCESS LOOK LIKE?

Pain intensity is important, but it is not the only possible measure of progress. Depending on the person’s goals, useful outcomes may include:

• improved mobility or physical capacity;

• greater confidence undertaking activity;

• better sleep or emotional wellbeing;

• reduced distress or fear;

• improved self-management;

• greater participation in family, work or community life;

• reduced reliance on treatments that are ineffective or harmful; and

• a clearer plan for managing future flares.

Improvement in function does not mean pain has been dismissed, and acceptance does not mean resignation. A person may seek pain reduction while also working towards meaningful goals that do not depend on pain disappearing completely.

QUESTIONS TO ASK YOUR HEALTHCARE TEAM

A good biopsychosocial assessment should result in a clear, individualised explanation rather than a vague statement that pain is “multifactorial”. Useful questions include:

1. What diagnosis or pain mechanism is most likely?

2. Are there symptoms or findings that require further investigation?

3. Which factors appear to be major contributors, and which are consequences of the pain?

4. What strengths or protective factors can we build upon?

5. Which treatment target should be addressed first?

6. What benefits and limitations can reasonably be expected?

7. How will progress be measured?

8. When should the diagnosis or treatment plan be reviewed?

KEY MESSAGE

The biopsychosocial model does not compete with biological medicine. It places biological findings within the full context of the person experiencing them.

Used appropriately, it validates pain, supports appropriate medical investigation, identifies interacting contributors and helps prioritise individualised care. Used poorly, it can become a superficial checklist or a way of psychologising and dismissing symptoms.

The aim is not to find something “wrong” in every domain. It is to understand which biological, psychological, and social processes matter for this person at this stage of their condition, and to develop an individualised treatment plan around their needs, preferences, and goals.

This article provides general educational information and is not a substitute for individual medical assessment or advice. Treatment options depend on the diagnosis, health circumstances, preferences and goals of each person.

Last medically reviewed: 28/08/2026

REFERENCES

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2. International Association for the Study of Pain. IASP terminology: definition of pain and accompanying notes. Revised 2020.

3. Raja SN, Carr DB, Cohen M, Finnerup NB, Flor H, Gibson S, et al. The revised International Association for the Study of Pain definition of pain: concepts, challenges, and compromises. Pain. 2020;161(9):1976–1982. doi:10.1097/j.pain.0000000000001939.

4. Gatchel RJ, Peng YB, Peters ML, Fuchs PN, Turk DC. The biopsychosocial approach to chronic pain: scientific advances and future directions. Psychological Bulletin. 2007;133(4):581–624. doi:10.1037/0033-2909.133.4.581.

5. Meints SM, Edwards RR. Evaluating psychosocial contributions to chronic pain outcomes. Progress in Neuro-Psychopharmacology and Biological Psychiatry. 2018;87(Pt B):168–182. doi:10.1016/j.pnpbp.2018.01.017.

6. Wade DT, Halligan PW. The biopsychosocial model of illness: a model whose time has come. Clinical Rehabilitation. 2017;31(8):995–1004. doi:10.1177/0269215517709890.

7. von Känel R. Applying a causal biopsychosocial model to guide medicine and psychiatry fifty years after Engel. Communications Medicine. 2026;6:322. doi:10.1038/s43856-026-01700-9.

8. Kapos FP, Craig KD, Anderson SR, Bernardes SF, Hirsh AT, Karos K, et al. Social determinants and consequences of pain: toward multilevel, intersectional, and life course perspectives. Journal of Pain. 2024;25(10):104608. doi:10.1016/j.jpain.2024.104608.

9. Brinjikji W, Luetmer PH, Comstock B, Bresnahan BW, Chen LE, Deyo RA, et al. Systematic literature review of imaging features of spinal degeneration in asymptomatic populations. AJNR American Journal of Neuroradiology. 2015;36(4):811–816. doi:10.3174/ajnr.A4173.

10. National Institute for Health and Care Excellence. Chronic pain (primary and secondary) in over 16s: assessment of all chronic pain and management of chronic primary pain. NICE guideline NG193. 2021.

11. Kamper SJ, Apeldoorn AT, Chiarotto A, Smeets RJEM, Ostelo RWJG, Guzman J, et al. Multidisciplinary biopsychosocial rehabilitation for chronic low back pain: Cochrane systematic review and meta-analysis. BMJ. 2015;350:h444. doi:10.1136/bmj.h444.

12. Williams AC de C, Fisher E, Hearn L, Eccleston C. Psychological therapies for the management of chronic pain, excluding headache, in adults. Cochrane Database of Systematic Reviews. 2020;8:CD007407. doi:10.1002/14651858.CD007407.pub4.

13. Murgatroyd DF, Casey PP, Cameron ID, Harris IA. The effect of financial compensation on health outcomes following musculoskeletal injury: systematic review. PLoS One. 2015;10(2):e0117597. doi:10.1371/journal.pone.0117597.

14. Australian Government Department of Health. The National Strategic Action Plan for Pain Management. Canberra: Commonwealth of Australia; 2021.