No MRI yet but that is what I want them to do next. And the GP was at the beginning of this process and had run all tests for what he thought it could be. I have been working with another person from this forum via PM trying to help me figure out what it is and any kind of remedy I could try. I just started taking Niacin (vitamin B3) which helps with circulation and seems to be helping some. This has been a slow progression that started back in August and got it's worst during December and January. At it's worst it would wake me up 3 to 4 times a night with my hands and arms blue and purple. I cut out all caffeine and sugar at that time which seemed to help a little but it happened. It makes it hard for me to work with my hands above my heart and depending on how high I'm using them depends on how fast they start to tingle and turn red. I lowered my handle bars a couple inches on my motorcycle which allows me to ride about 30 - 45 minutes before they start to tingle. It does it to my legs less and kind of depends on how I'm sitting, but for some reason my veins appear to be collapsing in my feet. Hopefully I can an MRI on Monday.