Health condition · Clinically reviewed
Fibromyalgia, chronic widespread pain — modern understanding.
A chronic pain syndrome with widespread pain, fatigue and cognitive symptoms. Modern models see it as nociplastic pain (central sensitisation) — best managed with multidisciplinary care.
Why trust this guide
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Clinically reviewed
Written by our editorial team and reviewed by a registered UK clinician before publication.
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Sourced from guidance
Every claim is checked against NICE, EULAR or peer-reviewed sources you can see at the end.
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Current for 2026
Reflects the modern nociplastic-pain model and current UK multidisciplinary management.
Key facts
Fibromyalgia at a glance.
The essentials, in plain English — what fibromyalgia is, how it is diagnosed, and how it is treated in the UK today.
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Definition
A chronic pain syndrome now understood as nociplastic pain — a change in how the central nervous system processes pain signals.
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How common
UK prevalence is around 2–4% of adults, with women affected more often than men.
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Diagnosis
Clinical, using the ACR 2016 criteria — a widespread pain index plus a symptom severity score, sustained for over three months.
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Blood tests
No blood test confirms fibromyalgia. Tests are used to exclude other causes such as inflammatory arthritis, thyroid disease or vitamin deficiency.
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Modern treatment
Multimodal — graded exercise, sleep repair, mood work, and selected medication (amitriptyline, duloxetine or pregabalin).
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Pacing principle
Pacing beats pushing through. Steady activity within a manageable envelope reduces flare-boom-bust cycles.
Why this guide matters
A real diagnosis, with a real playbook.
Fibromyalgia is often dismissed — it should not be. The modern nociplastic model gives it a mechanism, and the guidelines give it a plan.
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Nociplastic pain is real
Pain arising from altered central processing — not imagined, not deconditioning, and not depression alone.
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Diagnosis is clinical
The ACR 2016 criteria plus a focused exclusion of mimics gets most people to a confident label.
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Multimodal care wins
Exercise, sleep, mood work and selected medication together — no single ingredient carries the day.
How the diagnosis is made
From first widespread pain to a clear plan.
The steps a UK GP will normally follow, in order — so you know what to expect and why.
Phase 1 · Recognising
Pattern review and ACR scoring
Phase 2 · Confirming
Excluding inflammatory, endocrine and sleep mimics
Phase 3 · Managing
Rheumatology and structured pain programme
- 01
Recognising
Symptom pattern review
Widespread pain, fatigue, unrefreshing sleep and cognitive symptoms lasting more than three months.
- 02
Recognising
Widespread pain index & symptom severity
Applying the ACR 2016 criteria — a structured score across body regions and key symptoms.
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Confirming
Rule out inflammatory arthritis
CRP, rheumatoid factor and anti-CCP antibodies to exclude an inflammatory cause.
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Confirming
Rule out thyroid, vitamin D, B12 issues
TFTs, vitamin D and B12 — treatable mimics that can drive fatigue and diffuse pain.
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Confirming
Rule out sleep apnoea if suggestive
Snoring, witnessed apnoeas or daytime somnolence prompts a sleep study before labelling the picture fibromyalgia.
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Managing
Rheumatology consultation
Confirms the diagnosis, excludes overlapping conditions and frames the treatment plan.
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Managing
Pain-management team referral
Structured programme combining education, exercise, CBT/ACT and medication review.
Typical timeline: 6–12 weeks from first appointment to a settled plan.
Symptoms
What fibromyalgia actually feels like.
The cluster matters more than any single symptom — widespread pain with fatigue, unrefreshing sleep and cognitive difficulty.
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Widespread pain
Pain on both sides of the body, above and below the waist, for more than three months.
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Chronic fatigue
Persistent, disproportionate tiredness that is not fixed by a good night’s sleep.
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Unrefreshing sleep
Waking up as tired as you went to bed — often with disturbed deep sleep on studies.
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Fibro fog
Word-finding trouble, poor concentration and short-term memory lapses on tired days.
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Depression / anxiety
Common comorbidities — treating them meaningfully improves pain and function.
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GI symptoms
Bloating, altered bowel habit and overlap with irritable bowel syndrome in many people.
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Headaches
Tension-type and migraine headaches are more frequent in people with fibromyalgia.
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When to act now
Red-flag pain features — weight loss, night sweats, focal neurology — need urgent work-up first.
Treatment
How fibromyalgia is treated in the UK.
The evidence-based building blocks — movement, therapy, sleep and selected medication — worked as one plan, not four separate ones.
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Structured graded exercise
Aquatic and low-impact aerobic exercise, built up gradually, has the strongest evidence for pain and function.
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CBT / ACT
Cognitive behavioural therapy and acceptance and commitment therapy reduce distress and disability.
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Sleep repair
Consistent routine, screen limits and treating sleep apnoea or restless legs where present.
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Amitriptyline (low-dose)
Taken at night — helps pain and sleep architecture at doses well below antidepressant levels.
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Duloxetine (SNRI)
An SNRI licensed for chronic pain; also helps low mood and generalised anxiety where present.
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Pregabalin
A gabapentinoid used when neuropathic-type pain and sleep disruption dominate the picture.
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Pain management programme
A time-limited group programme combining education, movement, pacing and psychological skills.
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Multidisciplinary review
Rheumatology, pain medicine, physiotherapy and psychology working together on one shared plan.
What this guide is based on
The sources behind every claim on this page.
UK national guidance and specialist society standards, current at the time of last review.
Key references
Guidelines and standards we relied on.
A quiet reminder
This guide is for information, not medical advice.
Your GP or rheumatology team knows your history and can tell you which parts apply to you. If in doubt, get seen.
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NICE. Chronic pain (primary and secondary) in over 16s: assessment and management (NG193).
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EULAR. Revised recommendations for the management of fibromyalgia.
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British Society for Rheumatology. Guidelines library.
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Versus Arthritis. Patient information and support.
Red flags
When to look beyond a fibromyalgia label.
Fibromyalgia is a diagnosis by pattern and exclusion — these features mean another cause needs to be considered first.
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New neurological signs
Weakness, numbness in a nerve-root pattern or loss of coordination — urgent assessment, not fibromyalgia.
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Unexplained weight loss
Points to systemic disease and needs work-up before symptoms are attributed to fibromyalgia.
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Night sweats
Drenching night sweats warrant investigation for infection, inflammation or malignancy.
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Inflammatory arthritis missed
Warm, swollen joints with prolonged morning stiffness — early rheumatology assessment.
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Depression with suicidality
Thoughts of self-harm need same-day mental-health support, not a slow referral.
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Substance dependence
Escalating opioid, alcohol or benzodiazepine use — flag for structured, supported review.
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Sleep apnoea missed
Loud snoring, witnessed pauses and daytime sleepiness — investigate before labelling fatigue as fibromyalgia.
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New autoimmune diagnosis
Rashes, dry eyes and mouth or Raynaud’s can point to lupus or Sjögren’s and need specialist review.
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Post-trauma or PTSD comorbidity
Trauma-focused therapy alongside pain management improves outcomes and should not be skipped.
Living with it
A long-term condition, but a very manageable one.
Four things that make the biggest difference day to day — pacing, movement, sleep and a team around you.
A quiet reminder
Pacing beats pushing through.
Small, steady steps — kept up for months — do more than a heroic week that leaves you flattened.
- 01 Pacing
Work within your envelope
Steady, sustainable activity beats boom-and-bust — the goal is a wider envelope over months.
- 02 Movement
Gentle daily exercise
Walking, swimming or tai chi — start below what feels doable, then build slowly.
- 03 Sleep
Protect your sleep
A regular routine and a wind-down hour matter more than any single supplement or gadget.
- 04 Support
Team, not solo
A GP, a rheumatologist and a psychologist working together outperforms any one clinician alone.
Frequently asked
Everything we get asked about fibromyalgia.
Quick answers on diagnosis, blood tests, medication, pacing and when to ask for a specialist.
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What is fibromyalgia?
Fibromyalgia is a chronic pain syndrome with widespread pain, fatigue, unrefreshing sleep and cognitive symptoms. Modern models describe it as nociplastic pain — a change in how the central nervous system processes pain signals.
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How is fibromyalgia diagnosed?
It is a clinical diagnosis using the ACR 2016 criteria — a widespread pain index and symptom severity score, sustained for more than three months, with other causes excluded. No blood test or scan confirms fibromyalgia.
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Do I need blood tests?
Yes — but to exclude other causes rather than confirm fibromyalgia. Typical tests include CRP, rheumatoid factor and anti-CCP for arthritis, thyroid function, vitamin D and B12.
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What treatments actually work?
A multimodal plan works best: graded exercise (especially aquatic or aerobic), CBT or ACT, sleep repair, and selected medication such as low-dose amitriptyline, duloxetine or pregabalin.
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Should I push through the pain?
No — pacing beats pushing through. Steady activity within a manageable envelope, built up gradually, reduces the flare-and-crash cycle that many people describe.
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When should I see a specialist?
If symptoms are severe, if the diagnosis is unclear, or if primary-care treatment is not helping, ask for a rheumatology and pain-management team review.
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