Many fibromyalgia symptoms are like those of RA. But there are some key differences:
RA causes inflammation in the joints. The pain can come and go. With fibromyalgia, the ache is constant, and it happens all over your body. You feel dull pain that lasts at least 3 months.
With fibromyalgia, you often feel tenderness when someone touches you. It can also hurt to sit for 45 minutes.