Fibromyalgia

Overview

Fibromyalgia is a long-term condition whose central feature is widespread body pain, together with fatigue, unrefreshing sleep, and difficulty with concentration and memory. It is common, and it often sits alongside other rheumatic conditions such as rheumatoid arthritis or lupus rather than instead of them.

The pain of fibromyalgia does not come from inflammation or damage in the joints and muscles. Instead, it is understood as a change in the way the nervous system processes pain — the volume control for pain signals is turned up, so that ordinary sensations are felt as painful and painful ones more intensely. Doctors call this central sensitisation. It is a real, physical process, which is why the pain is genuine even though blood tests and scans are normal.

Fibromyalgia tends to fluctuate. There are better spells and worse spells, and symptoms can be set off by stress, poor sleep, or doing too much on a good day. Understanding the condition and learning to manage it is the foundation of getting better, and most people are able to improve their symptoms and stay active.

Symptoms

The defining symptom is pain felt in many parts of the body — typically on both sides, and both above and below the waist — that has been present for months. People describe it as aching, burning, or stiffness, and it can move around from day to day.

Alongside the pain, two symptoms are almost always present: profound tiredness that is not relieved by rest, and sleep that does not refresh, so a person wakes as tired as when they went to bed. Many people also notice problems with concentration and short-term memory, often called “fibro fog”, and a heightened sensitivity to touch, noise, bright light, or temperature.

Fibromyalgia frequently comes with other symptoms that share the same underlying mechanism: tension headaches or migraine, an irritable bowel, an irritable or urgent bladder, tingling in the hands and feet, and low mood or anxiety. Because the picture is so wide, it can be mistaken for several other conditions before the pattern is recognised.

Causes and risk factors

The exact cause is not known, but the current understanding is that the brain and spinal cord become more sensitive to pain signals and less able to dampen them down. Why this happens in one person and not another is not fully settled, and it is likely to involve a combination of an inherited tendency and a trigger.

Recognised triggers include a period of severe physical or emotional stress, a significant infection, or a physical injury such as an accident. Fibromyalgia is more common in women and can run in families. It is also more likely in people who already have an inflammatory rheumatic disease, which is one reason a rheumatologist looks carefully at whether both are present. Importantly, fibromyalgia is not caused by joint or muscle damage, and it does not lead to deformity or disability of the joints.

Diagnosis

Fibromyalgia is a positive clinical diagnosis, made from the characteristic pattern of symptoms — not simply a label given when everything else has been ruled out. The key features are widespread pain lasting more than three months, together with fatigue, unrefreshing sleep, and cognitive symptoms, in the absence of another condition that better explains them.

There is no blood test or scan that confirms fibromyalgia. Doctors sometimes use structured criteria, such as the widespread pain index and symptom severity score, which help describe the condition consistently but were designed mainly for research. In practice, the diagnosis rests on a careful history and examination.

Being given a clear diagnosis is itself an important step. Many people have spent a long time being told their tests are normal and worrying that they will not be believed. Naming the condition allows attention to shift from further tests towards a plan that actually helps.

Investigations

Tests are used to check for other conditions that can cause widespread pain and fatigue, rather than to prove fibromyalgia. A typical set includes a full blood count, inflammation markers (ESR and CRP), thyroid function, calcium and vitamin D, and sometimes a muscle enzyme (CK). In fibromyalgia these are usually normal, and a normal result does not mean the symptoms are imagined — it simply rules out other causes.

Extensive scanning and repeated blood tests are generally unhelpful and can prolong uncertainty. Imaging is reserved for when specific warning signs point to a different problem. Where an inflammatory disease such as rheumatoid arthritis or lupus is also suspected, the relevant antibody tests are checked, because the two can occur together.

Treatment

The most effective treatments for fibromyalgia are not medicines. European guidelines recommend starting with education about the condition and a programme of graded exercise, which has the strongest evidence of any single treatment. Alongside this, attention to sleep, techniques to manage stress, and learning to pace activity form the core of care.

When symptoms remain difficult despite these measures, certain medicines can help — not ordinary painkillers, which work poorly here, but medicines that act on the way pain signals are processed. Low-dose amitriptyline is often tried first, particularly to help sleep, and duloxetine or pregabalin are alternatives. These are introduced at a low dose and adjusted gradually, and their aim is to reduce symptoms enough to make exercise and daily life more manageable rather than to remove pain entirely.

Strong painkillers, and opioids in particular, are not recommended: they carry real harms and do not help fibromyalgia in the long term. Treating a coexisting low mood, anxiety, or poor sleep often improves the pain as well, which is why care usually addresses the whole picture rather than the pain alone.

Living with fibromyalgia

Regular, gentle exercise built up slowly is one of the most powerful things a person can do. It commonly feels harder at first and may briefly increase symptoms, which is expected; starting well below what feels possible and increasing very gradually is the key to lasting benefit. Aerobic activity such as walking, swimming, or cycling, and gentle strengthening, both help.

Good sleep routines, pacing activity to avoid the boom-and-bust cycle of overdoing it on good days, and support for mood and stress all make a real difference. Small adjustments at work and at home help people stay in their normal roles. Fibromyalgia is a long-term condition, but it does not damage the body, and with a consistent plan most people find their symptoms become more predictable and easier to live with over time.