I don't know if this well help anybody but even if it helps one person, then that would be great.
I haven't posted on here for a very long time but feel I have to today as I recently went to a private doctor for a burst ear drum. He did lots of blood tests and it turns out I have (and have had for a long time) severe allergies to dust mites, grass and dairy. My partner was shocked as I am generally a clean freak, the house is always clean (as excess dust gives me dermatitis) and I haven't eaten dairy for years as I thought I was just intolerant. I do however have indoor animals so there is hay everywhere!!!
I was advised to take antihistamines so I did that and steam cleaned everything I could to get rid of dust mites. (Steam cleaner only cost £40 and weighs next to nothing.) Well since doing this, within a few days, I have realised that I can now move so much more easily, I can get off the sofa without feeling like I'm 400 years old and I can use a duvet in bed without feeling like I'm on fire! The night sweats are nowhere near as bad and I can put my feet on the floor without the shooting pains. I was so surprised.
So I googled whether allergies can cause joint pain and sure enough, every website said it can cause joint pain, night sweats, inability to control body temperature and Fibromyalgia as the immune system is working in overdrive and causing inflammation!!
I would not recommend people going to one of those allergy testing shops as they are super expensive and I don't think they are genuine but I would definitely recommend getting some proper tests done, maybe on the NHS if they'll do it. I would also not recommend taking antihistamines unless you have confirmed allergies as unnecessary drugs cause even more side effects.
However, after 20 years of struggling, I feel soooo much better and am not anywhere near as exhausted as I used to be so I'm hoping maybe some others could benefit from this as well. I know allergies aren't often tested for but maybe it could help.
Wishing you all a good day.
Sally.