Secondly do you have such spasms throughout the day as well as night, even when you are resting and
not using your hand?
I would like to know whether you have concurrent illness like diabetes
, high blood pressure etc?
From all that you have said its really difficult to tell you what you are suffering from. To be on safer side, I think you should better get in touch with a physician who would examine you neurologically and then opine.
I would be happy if you keep in loop.