Gee, I don't know. I woke up once with a "dead left arm" which took 1/2 hr to wake up! Scared the dickens out of me that did.
But it never happened again.

Now I have a hard calcium/spur deposit on the middle of my left index finger. It is smack dab in between the 1st distal joint, and the middle. Now I do have some Heberden's nodes on my first joints of my right hand. And I recently had a sore thumb joint, that improved with extra magnesium lotion. But this is not at a joint. It first appeared this summer and I put a Salonpas on it for a week, (cut to fit), and then rubbed mag lotion on it every night and it went away. It has come back now and gone away twice since the summer. It is hard and about the size of a dime or slightly smaller, and only painful if I push on it too hard. I don't know what this is. I suspect it is a calcium nodule. I can feel it when I put my fingers all together --it rubs on the middle finger and feels odd.

Mysterious things sometimes?