Fibromyalgia is a syndrome-a set of symptoms that occur together. Experts have ideas about what may cause it, but there is not enough evidence to support any one idea. Some ideas include:
- Nerve cells may be too sensitive.
- Chemicals in the brain (neurotransmitters) may be out of balance.
- The deep phase of sleep may be disrupted and affect the amount of hormones that your body releases.
Many people connect the beginning of their symptoms to a certain event, such as the flu, an injury or surgery, or emotional trauma and stress. An event of this type combined with other things, such as increased sensitivity to pain and sleep problems, may lead to fibromyalgia in some people.