Scientific studies have demonstrated that most people with fibromyalgia have an abnormal sleep pattern, especially an interruption in their deep sleep. Some people with fibromyalgia have symptoms of CFS, and vice versa. For example, many people with CFS have the tender points and symptoms considered to be diagnostic of fibromyalgia. Because there is an overlap in these two common syndromes, it may not be possible to separate these two conditions, and one doctor may give a diagnosis of fibromyalgia whereas another may call the same condition chronic fatigue syndrome. Nervous System Symptoms Changes in mood and thinking are common in fibromyalgia.
Some people also feel very anxious.
Generally, the depression and anxiety seem to follow the onset of fibromyalgia symptoms and may be the result of the fibromyalgia rather than a cause of it. As with other chronic illnesses, people with fibromyalgia may report difficulty concentrating or performing simple mental tasks. There is no evidence that these problems become more serious. Similar problems have been noted in many people with sleep disturbances of all kinds or with mood changes. People with fibromyalgia may have feelings of numbness and tingling in their hands, arms, feet, legs, or sometimes in their face.