Well it sounds similar to some of the effects of dyspraxia. I thought for ages I had RA, carpal tunnel, or even maybe Duputryen's Contracture. Did the tests, doesn't seem to be any of those.
I have a lot of disorders, including mental disorders. Dyspraxia is a learning disability, in the same category as dyslexia. It causes executive dysfunction (this is kind of like the effects of fibro fog, but without the 'fog' and all the time, so bad memory, can't figure out when or how to do important things etc), difficulty handwriting, difficulty doing small motor movements, difficulty using 'proper' pen/pencil grip, strange gait or difficulty walking or running or swimming.
The symptom that really caught my attention is "arthritic tensing up of the hands" or other digits. My fingers tense up, the center of my palms and my wrists ache, same with the soles of my feet, and the more I try to 'push through it' the more it hurts.
If you think this is the case, the headaches could be from increased stress from worrying about it! The tingling could be your body going into and out of stages of numbness from the pain, or it could just be RLS showing up at the same time.
For some reason the joint pain isn't a commonly listed symptom, but I assure you it is one. Anyway pain can be a lot of things, but since Dyspraxia isn't usually considered I figured I'd mention it. Hope you work things out, mysterious symptoms are the worst.
