Interestingly, another lesser known symptom of fibromyalgia is dry skin, itching, and rashes.

The itchiness may result from misunderstood brain signals, and scratching leads to further irritation--and the cycle continues. The result is very painful until the skin heals. For people with fibromyalgia, this rash could feel like a bruise.

Be sure to moisturize daily, even if your skin isn't dry, to prevent complications.