GPAtlas🧭 When to suspect
Fibromyalgia is a long-term condition in which the nervous system becomes over-sensitised and amplifies pain signals, so the patient feels widespread pain, exhaustion, poor-quality sleep and “brain fog” – with no inflammation or tissue damage to find. This mechanism is called nociplastic pain (dysfunction in the central nervous system pathways, including amplified pain-signal processing, and decreased signaling of the descending pain inhibitory pathway).
It is not an inflammatory or autoimmune disease, and it is not “all in the mind”; NICE classifies it as a form of chronic primary pain.
It is common – around 2% of adults – and mostly affects women (roughly 80–90% of UK diagnoses), usually presenting between 30 and 60, though it occurs in men, younger and older people too. The practical point for primary care is that fibromyalgia is a positive, clinical diagnosis a GP can make: recognise the pattern, run a short screen to exclude mimics, and start management. Referral to rheumatology purely to “confirm” it is not needed.
| Feature | What you'll typically hear |
|---|---|
| Widespread pain (the core feature) | Aching or burning pain affecting most of the body for ≥ 3 months; often moves around and varies day to day. |
| Fatigue | Persistent tiredness, often worse after activity. |
| Unrefreshing sleep | Wakes tired however long they sleep. |
| Cognitive symptoms | Poor concentration and memory – “fibro fog”. |
| Sensory sensitivity & companions | Heightened sensitivity to noise, light, touch or temperature; commonly with headaches, IBS-type symptoms, low mood and morning stiffness. |
The ACR 2016 criteria formalise this pattern and can support the diagnosis, but fibromyalgia is recognised clinically – not by a questionnaire alone. Symptoms are often triggered by physical or psychological trauma, infection or major stress, and there is frequently a family history.
Source: NICE NG193 · RCP UK clinical guidelines 2022 · ACR 2016 criteria
|
🧠 Clinical pearl Fibromyalgia is not a diagnosis of exclusion. You don't need to rule out everything first – a recognisable pattern plus a normal short screen is enough to diagnose it positively, and it can sit alongside conditions like rheumatoid arthritis or lupus. A confident, validating diagnosis is itself part of the treatment; uncertainty and repeated “we're still looking” messages make patients worse. |
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