I turned 40 last December and in February woke up with a painful wrist. It was swollen, red and very painful to touch. After about 5 days my wrist returned to normal and a day later my other wrist did exactly the same thing! Seemed strange so I went to the doctors and I had blood tests for inflammatory markers, lupus, uric acid and all came back fine.
Since then I've had various joints swelling and being extremely painful. Wrists, fingers, elbows, shoulders. I've never felt pain like it and it's very debilitating. The 'attacks' feel random and without any noticeable triggers. Gout is the obvious culprit but I've now been for several blood tests and uric acid levels seem fine. My big toe has this far been unaffected. That said I have stopped drinking and started to be careful about what I eat.
This week has been particularly bad with both hands flaring up, I haven't been able to move my neck and I've just woken up with intense pain down the side of my knee (a first time in my knee)
Other thoughts are some sort of infection...
Otherwise I'm fit and healthy, I was going to the gym 3 times a week and running 10k's.
I'll obviously going back to the doctors but I'd be interested to hear if what I'm writing resonates with others.