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Anonymous
Fibromyalgia is more of a syndrome than a disease, due to it being a "group of problems". It is a chronic pain in the muscles and tissues surrounding joints. It is linked to fatigue, sleep problems, headaches, and many other issues.
Wiki User
Fibromyalgia can cause pain and tire someone out mentally. Arthritis only causes pain due to inflammation. The problem is physicians don't really know what causes fibromyalgia, unlike arthiritis which is famously known. Fibromyalagia is harder to bear, so I think fibromyalgia is worse than arthiritis.