I have never been able to be diagnosed for this because by the time I see an MD the problem is completely gone! Once, I was able to run into an emergency room and show a nurse, who then had to explain it to a Doctor because it went away a few minutes after I showed it to her.
What happens is this. I suddenly get a vein in my middle finger (or sometimes one that goes up the right middle side of my palm) of my right hand, that gets SUPER hard and dark purple. It hurts like ***l. Tears fill my eyes instantly. I can't move my finger (when it's in my finger). My finger gets super straight and frozen stiff. It's painful to touch. By the time I get to a hospital or the MD, the problem is completely gone, as it it never happened. It lasts no more than 10 minutes, sometimes less. The longest I've ever had it was 1/2 an hour. I've never even met anyone that has heard of this happening.
Any ideas? Thanks!