Fibromyalgia can start at any age, although it most commonly develops between the ages of 30 and 50. However, it can also occur in children and in older adults. Women are more likely to develop fibromyalgia than men, and it often runs in families. The exact cause of fibromyalgia is not known, but it is believed to involve a combination of genetic, environmental, and psychological factors. Some possible triggers or risk factors include physical or emotional trauma, infections, autoimmune disorders, and sleep disturbances. If you are experiencing symptoms such as widespread pain, fatigue, sleep problems, and cognitive difficulties, you should talk to your healthcare provider to determine the cause and appropriate treatment.