Can I use an ACE wrap to ease fibromyalgia and/or raynaud's?

Yes. The layers may help keep hand warm doubt ace will help fibromyalgia mu h.
Muscle Pain. Ace wraps do not usually relieve the pain from either fibromyalgia or raynaud's. Raynaud's benefits from heat. Fibromyalgia requires a comprehensive program to help with the pain syndrome.