I don't have FM but I do have an auto-immune disease. I started another thread about Health/Illness/Chronic Disease.
Generally life on the road is more active and a healthier lifestyle, don't you think? The smaller the space you have, the more you're outside and moving in the fresh air.
My disease, Microscopic Colitis, is controlled partly by diet. Finding healthy, whole, organic foods in all places is a challenge and expensive; storing them in quantity when I do find them takes storage space. A decent sized fridge/freezer is crucial for fresh veggies and fruit and berries.
Cooking in a tiny space has been fine. First and most important, I keep meals as simple as possible......no fancy recipes with all kinds of ingredients, just plain food. A sweet potato is good the way it is!
I use the dinette table for prepping, cover the sink with an insert, and cook on only one burner on our induction plate. It just takes planning and time......and we have lots of time in this lifestyle!
We do have a microwave/convection oven and a small table grill too. Making meals for someone else as well can be hard on the days our foods differ drastically or on the days I'm extra tired.
Another part of my disease management is relaxation.......breathing, meditation, mindfulness, yoga. All of that has been doable even in our small RV, sometimes on the bed or floor or outside on a mat. Sometimes people stare at me doing yoga or sitting meditating but that's their problem; I have to do what keeps me healthy!
Controlling stress was a huge issue for the first few months of fulltiming when we were just learning everything. And stress is a huge factor in auto-immune diseases! I would get wound up over packing, moving, travelling, navigation, traffic. I think it's better for me if I stay in one place for a longer time, 2 weeks to a month maybe.
My illness started the day I moved onto the RV after the extreme stress of selling everything we owned: house, barn, outbuildings, 14 acres, furniture, possessions. That all happened in 2 months! So I don't know how I would feel if I still lived in a sticks and bricks house. I'm managing and enjoying myself most days so I guess it's all good.
I'm so glad to know that others are coping.....and thriving?......on the road with chronic illnesses.