I didn't know there was an official diagnosis for this. My hands started doing this intermittently about 6 months ago. I thought it was because of some meds I'm on but I am taking nothing new. At times it is worse than others. I can take a Xanax and it works sometimes. It even affects my typing on the computer. I was at dinner one night with my son and his family and my DGD said "Nana, why is your hand shaking?" I wasn't even aware of it shaking but she saw it. Some days they do not shake at all and then another day, I'll pick up something and drop it because my hands are shaking so badly. It has also affected my handwriting and I found printing is easier than cursive.
I guess I better ask my rheumatologist)sp) next week when I see him.