Dead finger

Please forgive me if this has been answered in an earlier thread! Does anyone else get dead fingers? In the last few months this has happened a few times (not always the same finger or the same hand), and I don't know if it's Parky related or the meds (ropinorole xl). Not sure what triggers it either. When it happens the blood supply seems to be cut off about half way up my finger. The end goes white and numb and the middle of my finger looks bruised. It only lasts about 15-20 minutes, but it's a bit alarming.
yes i get it often, and i am not on ropinerole. it comes and goes. you just learn to cope as with every thing else sorry can;t be any more helpful than that.