In some people, fibromyalgia causes feelings of stiffness in many parts of their muscles. Usually, this sensation occurs in the shoulders and neck, but it can also happen in other limbs. Most commonly the person wakes up feeling very stiff. Others may experience this after a long time spent in a stationary position. In its mildest form, it could feel like an aggravated attack of pins and needles. Sometimes patients might also get painful spasms in certain muscles, or they suddenly feel the need to move their legs all the time.

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