bcfromfl: I agree with your suggestion---great idea to keep warm. I felt better when I added (even more!) layers of clothing during the day, and wrapped up in a blanket when I sat on the couch and read in the evening.
And yes, those warm showers not only help with the heat but also the stiffness.
I even wore a stocking cap inside the house for a few days, as I've heard heat can be lost quickly if your head isn't covered; well, at least they say that when you're outside in the cold, you can lose heat quickly through your head. But it definitely helped me inside the house, too.
Winter is definitely a time to stay warm and cozy, as much as possible. I make sure I have on extra clothing and I wear a winter hat, even if I'm just going outside for a short time, feeding the dog or filling the bird feeder. But I should also mention I'm in a very cold climate, so that's a factor for me, too.
I think staying warm is more important that we think, if we have an autoimmune condition. You made an important point, IMO!
"When you encounter difficulties and contradictions, do not try to break them, but bend them with gentleness and time."
St. Francis de Sales