Chronic pain: how to actually help when pain persists
When pain lasts beyond three months, it stops being a simple alarm about tissue damage and becomes a condition in its own right, driven largely by changes in the nervous system itself. The most useful thing modern pain science tells us is that persistent pain is genuinely real even when scans look normal, and that the most reliable help comes not from stronger painkillers but from a combination of understanding the pain, moving in a graded way, protecting sleep, and addressing the stress and low mood that pain so often brings. None of this means the pain is imagined or your fault. It means there are real, evidence-based levers to pull.
Key facts
- Chronic pain affects roughly one third to one half of UK adults, just under 28 million people, rising with age.1
- In acute pain, hurt roughly tracks harm. In chronic pain, the nervous system can stay amplified, a process called central sensitisation, so pain persists even when tissues have healed.2
- Spine changes on MRI, including disc bulges and degeneration, are common in people with no pain at all, rising from about 30% of 20 year olds to over 80% of 80 year olds.3
- UK guidance (NICE NG193) recommends against starting opioids, gabapentinoids, paracetamol or NSAIDs for chronic primary pain, and instead points to exercise, psychological therapy and, where chosen, certain antidepressants.4
- Exercise, CBT and acceptance-based therapy show small but genuine, well-replicated benefits; the honest framing is steady gains, not a cure.78
Why chronic pain is different from acute pain
Acute pain is a brilliant warning system. Touch a hot pan and specialised nerve endings fire, a signal races to the spinal cord and brain, and you pull away before real damage is done. In that situation, the amount you hurt roughly tracks the amount of harm. Most acute pain settles as tissues heal over days to weeks.
Chronic pain, usually defined as pain lasting more than three months, works differently. Here the problem is often less about ongoing tissue damage and more about the pain system itself becoming oversensitive. The key concept is central sensitisation: an amplification of signalling within the central nervous system that produces pain hypersensitivity.2 Put plainly, the nervous system has turned up the volume. Neurons in the spinal cord and brain become more excitable, so signals that would normally be mild, or not painful at all, are now experienced as painful.
Two features doctors look for capture this. Hyperalgesia is when something that should hurt a little hurts a lot. Allodynia is when something that should not hurt at all, such as light touch or the weight of clothing, becomes painful.2 Alongside this, the brain's own "dimmer switch", the descending pathways that normally damp pain down, can work less well, and stress, poor sleep and worry can all nudge the volume higher. This is not a character flaw or weakness. It is a change in a biological system, and importantly, the research describes it as a state that can be modified rather than a permanent fault.5
A helpful way to hold this: in acute pain, the question is mostly "what is damaged?". In persistent pain, the more useful question becomes "why is this protective system staying switched on, and what is keeping the volume up?". That shift changes everything about what helps.
Why the pain is real even when scans are normal
One of the most distressing experiences in chronic pain is being told the scan is "normal" or "nothing serious", and walking away feeling disbelieved. Let us be clear: a normal scan does not mean the pain is imagined. It means the pain is being generated and maintained by the nervous system rather than by visible structural damage, and that is a real, recognised medical phenomenon.
The flip side is just as important, and surprisingly freeing. Imaging "abnormalities" are extremely common in people with no pain whatsoever. In a large systematic review by Brinjikji and colleagues of spine MRI in pain-free people, disc degeneration was present in 37% of 20 year olds and 96% of 80 year olds, while disc bulges rose from 30% to 84% across the same age range.3 In other words, much of what shows up on a scan is the bodily equivalent of grey hair: a normal sign of ageing, often unrelated to pain. This is why findings on a scan and the pain you feel can be so loosely connected, and why chasing every imaging finding rarely solves persistent pain.
Evidence strength, plainly. The disconnect between imaging and symptoms in the spine is well established across large reviews.3 Central sensitisation is strongly supported as a mechanism in conditions such as fibromyalgia and many chronic low back pain presentations, and is best understood as mechanistic and clinical evidence rather than a single number you can measure in clinic.25
The biopsychosocial model and pain neuroscience education
Because persistent pain is produced by a whole system, not a single damaged part, modern pain medicine uses a biopsychosocial model. That is not a polite way of saying "it is in your head". It means three sets of factors all feed into how much pain you feel: biological (the state of tissues and nerves), psychological (stress, mood, fear of movement, attention) and social (sleep, work, relationships, support). Each is a real input, and each is a potential lever.
One practical tool built on this is pain neuroscience education (PNE), popularised through the work of Lorimer Moseley and David Butler. The idea is simple but powerful: when people understand that pain is the brain's protective output rather than a direct readout of damage, the threat level drops, and movement feels safer. Umbrella reviews and meta-analyses find that PNE, especially when combined with exercise, produces modest reductions in pain, disability, fear of movement and catastrophising in chronic musculoskeletal pain.6 The effects on pain alone are small, and the evidence quality is mixed, so PNE is best seen as a foundation that makes the active treatments work better, not a standalone fix.
Our overview of what stress does to your body explains how a nervous system on high alert can amplify physical symptoms; the same logic applies directly to pain.
What actually helps: the evidence
The honest headline is that no single treatment is a cure, but several have small, repeatable benefits that add up, particularly when combined and sustained. Here is what the better evidence shows.
| Approach | What it involves | Evidence and effect |
|---|---|---|
| Movement and graded activity | Gradually building activity from a manageable baseline, almost any type, rather than resting or pushing into flares | Cochrane overview: generally improves function and quality of life, with few harms; effects vary and many trials are small.7 |
| CBT (cognitive behavioural therapy) | Changing unhelpful thoughts and behaviours around pain; pacing, problem-solving, reducing avoidance | Cochrane review of 75 studies: small but robust improvements in disability and distress, negligible on pain intensity itself.8 |
| ACT (acceptance and commitment therapy) | Building "psychological flexibility": acting on what matters even while pain is present, rather than fighting the pain | Meta-analyses: small to medium benefits for functioning and distress; aim is a fuller life, not pain removal.9 |
| Sleep | Treating insomnia and improving sleep quality, often the most overlooked lever | Strong bidirectional link; poor sleep appears to predict and worsen pain, so improving sleep can lower pain sensitivity.10 |
| Certain antidepressants | Used for pain modulation, not only mood; NICE lists them as an option to discuss for chronic primary pain | NICE NG193: evidence of benefit for quality of life, pain, sleep and distress versus placebo; a shared decision.4 |
Movement and graded activity
For many people the instinct is to rest and protect, yet prolonged rest tends to make sensitised systems worse and deconditions the body. The Cochrane overview of physical activity and exercise for chronic pain by Geneen and colleagues concluded that exercise tends to improve function and quality of life with little risk of harm, even if the size of the benefit is variable and the trial quality often modest.7 The key word is graded: start below the level that triggers a flare, build slowly, and expect some ups and downs. The type matters less than finding something you will actually keep doing.
The mind is not the enemy here
CBT and ACT are not about proving pain is psychological. They target the very real ways that fear, low mood and avoidance amplify suffering and shrink your life. The Cochrane review led by Amanda Williams pooled 75 studies and found CBT gives small but reliable improvements in disability and distress, with little effect on raw pain scores, which is an honest and useful finding: the goal is to suffer less and do more, even if the pain dial barely moves.8 ACT takes a slightly different route, building the capacity to pursue what matters to you alongside pain, and meta-analyses report small to medium gains in functioning.9 Living with persistent pain understandably wears on mood, and if low mood or anxiety has taken hold, our pieces on low mood versus depression may help you judge when to seek extra support. There is no shame in needing it.
Sleep, the quiet lever
Pain wrecks sleep, and broken sleep then lowers your pain threshold the next day, a vicious loop. Reviews of this relationship find it runs strongly in both directions, and increasingly that poor sleep is a powerful driver of worse pain rather than simply a consequence of it.10 That makes sleep one of the highest-value things to address. Treating insomnia directly, often with cognitive behavioural therapy for insomnia, can be one of the more effective indirect ways to turn the pain volume down.
The honest limits of opioids, and the NICE controversy
Opioids can be valuable for short-term acute pain and in cancer and end-of-life care. For long-term, non-cancer pain the picture is very different, and UK guidance has moved firmly away from them. The Faculty of Pain Medicine's Opioids Aware resource states plainly that there is little evidence opioids help chronic non-cancer pain over the long term, that harms rise with dose, and that the recommended ceiling has been lowered, with caution advised above 50mg oral morphine equivalent a day and specialist input suggested above 90mg.11 Only a small minority of people get good lasting relief, and they are hard to identify in advance.
A particular trap is opioid-induced hyperalgesia: with prolonged use, opioids can paradoxically make the nervous system more sensitive to pain, so the medicine that was meant to help quietly fuels the problem.11 If you are on long-term opioids and they are not clearly improving your function, this is worth a careful, supported conversation with your prescriber. Do not stop suddenly on your own, as that can cause withdrawal; reductions should be slow and planned with your GP or pain service.
This is the backdrop to the 2021 NICE guideline on chronic pain (NG193), which covers chronic primary pain, pain with no clear underlying cause or out of proportion to any visible injury.4 NICE recommended not starting opioids, gabapentinoids, paracetamol, NSAIDs or benzodiazepines for chronic primary pain, on the grounds they show little benefit and real potential for harm, while recommending supervised exercise, psychological therapy (CBT or ACT), acupuncture, and a discussion of certain antidepressants as an option.4
The guidance was genuinely controversial. Critics, including some pain specialists, argued that "chronic primary pain" is a relatively new category, that the bar for evidence was set in a way few drugs could meet, and that people already managing on a stable medicine could feel abandoned.12 Supporters countered that it rightly steers away from medicines that have caused real harm and towards active, self-management approaches.12 The fair reading is that NG193 reflects an honest reckoning with weak drug evidence, while the debate about how it lands for individual patients, especially those already established on treatment, remains live. It is not a reason to withhold help; it is a reason to broaden what "help" means.
Putting it together
Living with persistent pain is exhausting and, too often, lonely. But the modern picture is genuinely more hopeful than the old one, because it points to multiple real levers rather than a single pill. Understanding your pain, moving in a graded way, protecting your sleep, and getting support for the mood and stress that pain brings are not consolation prizes. They are the treatments with the best evidence behind them. If you like to change one thing at a time and track what helps, our getting-started guide sets out that approach, and you can browse more across our insights library.
What to ask your GP
- Does my pain look more like chronic primary pain, or is there a treatable underlying condition we should investigate or rule out?
- Can you refer me to a pain management programme, physiotherapy, or NHS Talking Therapies for support with mood and coping?
- If I am on long-term opioids or gabapentinoids, are they actually helping my function, and could we plan a slow, supported review?
- What can we do about my sleep, given how strongly it affects pain?
- Is there a local community pain education or self-management course I can join?
References
- Fayaz A, Croft P, Langford RM, Donaldson LJ, Jones GT, 2016. Prevalence of chronic pain in the UK: a systematic review and meta-analysis of population studies. BMJ Open 6:e010364. PMC4932255.
- Latremoliere A, Woolf CJ, 2009. Central sensitization: a generator of pain hypersensitivity by central neural plasticity. J Pain 10(9):895-926. PMC2750819.
- Brinjikji W, Luetmer PH, Comstock B, et al., 2015. Systematic literature review of imaging features of spinal degeneration in asymptomatic populations. AJNR Am J Neuroradiol 36(4):811-816. ajnr.org.
- National Institute for Health and Care Excellence, 2021. Chronic pain (primary and secondary) in over 16s: assessment of all chronic pain and management of chronic primary pain (NG193). nice.org.uk.
- Nijs J, Goubert D, Ickmans K, 2016. Recognition and treatment of central sensitization in chronic pain patients. J Orthop Sports Phys Ther; see also Management of chronic sensitization. PMC3620001.
- Siddall B, Ram A, Jones MD, et al., 2022. Short-term impact of combining pain neuroscience education with exercise for chronic musculoskeletal pain: see umbrella review of pain neuroscience education. Front Neurosci 2023;17:1272068. frontiersin.org.
- Geneen LJ, Moore RA, Clarke C, Martin D, Colvin LA, Smith BH, 2017. Physical activity and exercise for chronic pain in adults: an overview of Cochrane Reviews. Cochrane Database Syst Rev 4:CD011279. cochranelibrary.com.
- Williams AC de C, Fisher E, Hearn L, Eccleston C, 2020. Psychological therapies for the management of chronic pain (excluding headache) in adults. Cochrane Database Syst Rev 8:CD007407. cochranelibrary.com.
- Lai L, Liu Y, McCracken LM, et al., 2023. The efficacy of acceptance and commitment therapy for chronic pain: a three-level meta-analysis and trial sequential analysis of randomized controlled trials. Behav Res Ther 165:104308. sciencedirect.com.
- Finan PH, Goodin BR, Smith MT, 2013. The association of sleep and pain: an update and a path forward. J Pain 14(12):1539-1552. See also Nature review, 2019. nature.com.
- Faculty of Pain Medicine of the Royal College of Anaesthetists. Opioids Aware: opioids for long-term pain and long-term harms of opioids. fpm.ac.uk.
- Smith BH, Hardman JD, et al., 2021. NICE guideline NG193 for chronic pain: reasons to be cheerful?, and accompanying commentary. Br J Pain / PMC. PMC8544154.
This article is educational and does not constitute medical advice, diagnosis, or a treatment recommendation. Medication uses described as “off-label” are not licensed for that purpose in the UK and should only be considered under qualified clinical supervision. Always speak to your GP, pharmacist, or a registered specialist before starting, stopping, or changing any treatment. If you have severe or alarm symptoms - unintentional weight loss, blood in your stool, difficulty swallowing, persistent vomiting, a fever, or severe pain - seek urgent medical care.