Fibromyalgia is a long-term condition that is believed to affect the nervous system, according to the NHS.
The exact cause of fibromyalgia is unknown, but it could be due to changes in the way the nervous system processes pain messages around the body.
Anyone can develop the condition, but women are about seven times more likely to have it.
The most common fibromyalgia symptom is widespread pain across the entire body.
But, what other symptoms should you be looking out for?
“Fibromyalgia has many symptoms that tend to vary from person to person,” said the NHS.
“There may be periods when your symptoms get better or worse, depending on factors such as your stress levels, changes in the weather, how physically active you are.
“If you have fibromyalgia, one of the main symptoms is likely to be widespread pain.
“This may be felt throughout your body, but could be worse in particular areas, such as your back or neck.
“The pain is likely to be continuous, although it may be better or more severe at different times.”
The pain may feel like a burning sensation, or a sharp stabbing pain, the NHS added.
But, patients have also reported extreme sensitivity – the slightest touch may be painful.
If you hurt yourself, the pain may last much longer than non-patients, too.
Other fibromyalgia symptoms include stiffness, fatigue and poor sleep quality.
Fibromyalgia patients may also develop ‘fibro-fog’.
Fibro-fog is the name given to cognitive problems, linked to the condition.
Patients may struggle to learn new things, or have problems with attention or concentration.
Headaches and irritable bowel syndrome have also been linked to the condition.
If you think you have fibromyalgia, you should speak to a GP.
While there’s no cure for the condition, some treatments could help to relieve some of the fibromyalgia pain.