Fibromyalgia: understanding the pain that is real but invisible

What fibromyalgia is — and is not

Fibromyalgia is a chronic pain condition affecting around 2 to 4 percent of adults, with women diagnosed three to six times more often than men. The cluster of symptoms is consistent: widespread musculoskeletal pain present for at least three months, fatigue that does not improve with rest, sleep that is broken and unrefreshing, and a foggy, slow quality of thinking that people often call “fibro-fog”. Many people also experience irritable bowel symptoms, headaches, dizziness on standing, painful periods, and bladder urgency.

For decades, fibromyalgia was dismissed as psychosomatic — a polite term for “in your head”. The current evidence does not support that view. Functional MRI studies show that people with fibromyalgia have increased activity in the brain’s pain-processing networks and reduced activity in the descending pathways that normally dampen pain signals. The International Association for the Study of Pain formally recognised this in 2017 as a third mechanism of pain — nociplastic pain — sitting alongside nociceptive pain (from tissue damage) and neuropathic pain (from nerve damage). The everyday description is “central sensitisation”: the volume dial on your central nervous system’s pain system has been turned up, even when the tissues themselves are not damaged.

This matters clinically. It explains why investigations such as MRI scans of the back, knees, or shoulders often come back normal in fibromyalgia — the pain is real but it does not originate from the tissue at the site where it is felt. It also explains why treatments that work for tissue-damage pain (anti-inflammatories, opioids, joint injections) often fail in fibromyalgia, and why treatments that change how the nervous system processes signals (graded exercise, cognitive behavioural therapy, certain medicines, mindfulness) tend to work better.

The Royal Australian College of General Practitioners, the Australian Pain Society, Therapeutic Guidelines (eTG), EULAR 2017, and the UK NICE NG193 guideline on chronic primary pain all converge on the same picture: fibromyalgia is a real, biology-based condition, and a multimodal management approach works.

What triggers fibromyalgia

There is no single cause. Most people can identify one or more triggers in the months before symptoms emerged:

• Infections — particularly Epstein-Barr virus, COVID-19, Ross River virus, and Lyme disease in endemic regions. Post-viral nociplastic pain syndromes appear to be increasing since the pandemic.
• Physical trauma — motor vehicle accidents, falls, major surgery, childbirth complications.
• Psychological stressors — bereavement, relationship breakdown, workplace burnout, post-traumatic stress, a history of childhood adversity or abuse.
• Other chronic pain — long-standing back pain, migraine, endometriosis, or irritable bowel syndrome can act as a sensitising background.
• Sleep disruption — obstructive sleep apnoea, restless legs, shift work, or chronic insomnia from any cause.

Genetics also matters. First-degree relatives of someone with fibromyalgia have approximately an eight-fold increased risk. Fibromyalgia also clusters with conditions sharing the same central-sensitisation mechanism: chronic fatigue syndrome (ME/CFS), POTS (postural orthostatic tachycardia syndrome), hypermobility spectrum disorders, irritable bowel syndrome, migraine, temporomandibular joint pain, vulvodynia, and interstitial cystitis. Doctors call this overlap group “central sensitivity syndromes”.

The most accurate model is that a genetically vulnerable nervous system is tipped into a persistent sensitised state by one or more triggers, often combined. Stress, sleep deprivation, and ongoing pain then maintain the sensitisation.

How fibromyalgia is diagnosed

Fibromyalgia is a clinical diagnosis. There is no blood test, scan, or biopsy that confirms it. The current criteria are the American College of Rheumatology 2016 criteria, which require all of the following:

1. Widespread pain — pain in four out of five body regions (left upper, right upper, left lower, right lower, axial/spine), with at least seven painful sites overall.
2. Symptom severity — significant fatigue, unrefreshing sleep, and cognitive symptoms.
3. Duration — symptoms present for at least three months.
4. No better explanation — other conditions that could cause the symptoms have been considered and excluded.

Importantly, the older practice of pressing on 18 specific tender points has been retired — it was not reproducible between examiners, missed many genuine cases, and stigmatised the condition.

Your GP will usually order a focused set of blood tests to exclude conditions that can mimic fibromyalgia:

• Full blood count, ESR, CRP — to look for inflammation suggesting rheumatoid arthritis, polymyalgia rheumatica, or lupus.
• TSH — for underactive thyroid (hypothyroidism), which causes fatigue and muscle pain.
• Vitamin D, vitamin B12, iron studies, ferritin — common deficiencies that can cause widespread pain and fatigue.
• Calcium, magnesium, creatine kinase (CK) — to rule out metabolic and muscle disease.
• Coeliac serology — if there are gut symptoms.
• ANA, rheumatoid factor — only if there are specific features suggesting autoimmune disease, such as joint swelling, rash, Raynaud’s, dry eyes, or family history.

Most people with fibromyalgia have entirely normal blood results. That is part of the diagnostic pattern, not a reason to doubt the diagnosis. A sleep study is added if there are features of obstructive sleep apnoea (loud snoring, witnessed pauses in breathing, daytime sleepiness, higher BMI).

What actually helps — the evidence

Fibromyalgia responds best to a combination of strategies, not to a single magic treatment. The strongest evidence — from large Cochrane systematic reviews and the EULAR 2017 management recommendations — supports a multimodal approach.

Graded exercise

This is the single most effective intervention for fibromyalgia. Aerobic exercise (walking, cycling, swimming) and strength training both show consistent benefits for pain, function, and fatigue. The key is “graded” — start at a level you can comfortably sustain, even if that is only 5 minutes of walking daily, then increase by very small amounts each week or fortnight. People who push too hard, too early, often experience a flare and become discouraged. The principle is called “pacing”.

painHEALTH, a free Australian resource developed by the University of Western Australia, has excellent step-by-step exercise programs designed for chronic pain. Working with an exercise physiologist or physiotherapist trained in chronic pain helps many people get started safely.

Cognitive behavioural therapy (CBT) and pain neuroscience education

CBT adapted for chronic pain reduces pain catastrophising, improves coping, and reduces disability. Pain neuroscience education — learning in plain language how central sensitisation works — has been shown to reduce pain intensity and improve outcomes. The Australian-developed resource “Tame the Beast”, based on Professor Lorimer Moseley’s work, is freely available online and widely used.

CBT is accessible in Australia through a Mental Health Treatment Plan from your GP, which subsidises up to 10 psychology sessions per year under Medicare.

Sleep optimisation

Unrefreshing sleep amplifies central sensitisation. Treating sleep problems is foundational. This means addressing obstructive sleep apnoea if present (with CPAP if indicated), screening for and treating restless legs syndrome, and using CBT for insomnia rather than long-term sleeping tablets where possible.

Mind-body therapies

Tai Chi has trial evidence equivalent to aerobic exercise in fibromyalgia. Yoga (gentle or restorative styles), Qigong, and mindfulness-based stress reduction all have moderate supporting evidence. These approaches combine gentle physical movement, mindfulness, and breath work — all of which dampen central sensitisation.

Medications — modest help

Medicines play a supporting role, not a starring role. The Australian first-line is low-dose amitriptyline taken at night, an older antidepressant used at much smaller doses than its antidepressant role, which helps both pain and sleep. Duloxetine (an SNRI antidepressant) and pregabalin (originally an anti-seizure medicine) both have RCT evidence of modest benefit. Your GP will discuss which is most appropriate for you, balancing benefits, side effects, other conditions, and pregnancy or breastfeeding plans. Your GP will not prescribe dosing decisions over a webpage — those are tailored.

What does not help, and what guidelines recommend against:

• Strong opioids (morphine, oxycodone) — limited efficacy, real harm, and can paradoxically worsen pain over time (opioid-induced hyperalgesia). Both EULAR and NICE explicitly advise against them.
• Long-term anti-inflammatories (NSAIDs) — fibromyalgia is not an inflammatory condition, and chronic use carries gut, kidney, and cardiovascular risk.
• Corticosteroids — no evidence of benefit, real long-term harms.
• Polypharmacy — many people arrive on three or four overlapping medicines that interact dangerously. Periodic medicine reviews with your GP are essential.

Diet, deficiencies, and other adjuncts

Correcting vitamin D, B12, and iron deficiencies if present is worthwhile on its own merits and may modestly improve symptoms. A Mediterranean-style diet pattern shows some observational benefit. Reducing alcohol and caffeine often helps sleep. Acupuncture has modest short-term evidence for pain. Hydrotherapy (warm-water exercise) is well tolerated, where you can access a pool.

When to see your GP

Book a GP appointment if you have:

• Widespread pain (in multiple body areas) lasting more than three months
• Persistent fatigue that does not improve with rest
• Unrefreshing sleep most nights for several weeks or longer
• Difficulty concentrating, word-finding, or remembering (“brain fog”)
• A previous diagnosis of fibromyalgia and symptoms are worsening, or your current management is not working

Your GP will take a full history, examine you, order targeted investigations, and either make the diagnosis directly or refer to a rheumatologist or pain specialist if uncertainty remains. They will also screen for and manage commonly co-occurring conditions — depression, anxiety, irritable bowel syndrome, headaches, sleep disorders. A Mental Health Treatment Plan, an exercise physiology referral, and a clear written self-management plan are all reasonable starting steps.

Red flags — see a doctor sooner

Some features suggest that the pain is not fibromyalgia and need urgent assessment:

• New joint swelling, redness, or warmth — suggests inflammatory arthritis.
• Skin rash, hair loss, mouth ulcers, dry eyes or mouth, Raynaud’s (white-blue fingers in cold) — suggests connective-tissue disease such as lupus.
• Fevers, night sweats, unexplained weight loss — could indicate infection or cancer.
• Severe morning stiffness lasting more than an hour — points toward inflammatory arthritis.
• New neurological symptoms — numbness, weakness, problems with bladder or bowel control, visual changes.
• Symptoms starting suddenly after age 65 — late-onset widespread pain is more likely to be polymyalgia rheumatica, late-onset rheumatoid arthritis, or, rarely, an underlying cancer.
• Significant suicidal thoughts — call Lifeline 13 11 14 or attend an emergency department.

If any of these apply, see your GP this week, not next month.

A realistic outlook

Most people with fibromyalgia improve meaningfully over months to years with consistent, multimodal management. The realistic goal is improved function and quality of life — being able to work in the role you want, sleep adequately, exercise regularly, and engage with family — rather than complete elimination of pain. Some people achieve long stretches with very mild symptoms; others have a relapsing course with flares triggered by stress, infection, or poor sleep.

What predicts long-term improvement, across multiple studies, is persistence with non-medication strategies — exercise, psychological tools, sleep hygiene, pacing — combined with carefully selected medication and a strong therapeutic alliance with a GP who validates the diagnosis rather than dismissing it.

What this article is and is not

This is general health information drawn from current Australian and international clinical guidelines — RACGP, Therapeutic Guidelines (eTG), the Australian Pain Society, EULAR 2017, NICE NG193, Cochrane systematic reviews, and the ACR 2016 diagnostic criteria. It is not personal medical advice and does not create a doctor–patient relationship. Diagnostic and treatment decisions, including which investigations to order, which medications are appropriate, and which non-medication strategies to prioritise, are made collaboratively with your own GP and specialist clinicians who know your full history.

For Australian consumer-friendly information: HealthDirect — Fibromyalgia · Better Health Channel — Fibromyalgia · painHEALTH.

For acute mental-health crisis: Lifeline 13 11 14 · Beyond Blue 1300 22 4636.

Sources cited

1. RACGP — Fibromyalgia in general practice
2. Therapeutic Guidelines — eTG complete (Fibromyalgia)
3. Australian Pain Society — Pain Management Strategies
4. painHEALTH — Fibromyalgia (University of Western Australia)
5. HealthDirect — Fibromyalgia
6. Better Health Channel — Fibromyalgia
7. EULAR 2017 — Revised recommendations for the management of fibromyalgia (Macfarlane et al.)
8. NICE NG193 — Chronic primary pain (2021)
9. ACR 2016 Revised Fibromyalgia Diagnostic Criteria (Wolfe et al.)
10. Cochrane reviews — therapies for fibromyalgia