Can fibromyalgia cause weakness?

No: Fibromyalgia does not produce weakness if weakness is defined as loss of muscle strength. However, fibromyalgia may produce fatigue or lack of effort which may be confused with weakness. Fibromyalgia may also produce a great deal of pain that interferes with full application of strength. This condition is detected by the astute clinician as "give way" weakness, not true weakness.

No: Fibromyalgia does not cause muscle weakness. Motor strength is normal. However because of chronic pain, some patients stop exercising and can become de-conditioned. Fibromyalgia patients can also have fatigue but they do not have true muscle weakness.

Yes: ? can fibromyalgia, FM, "cause weakness". Generalized weakness is a hallmark symptom of FM. FM caused by conjoining of several co-factors: femaleness, childbirth, prolonged inactivity, mechanical injury, hypermobility. Muscle weaknesses impart asymmetric body postures/biomechanical functions, which beget further sedentariness & advanced generalized muscle weakness; sometimes even bedridden status.