I was referring more to the features, like the blanching/fading when laying down and prominent when sitting/standing as well as blanching with pressure. And the temperature sensitivity...yet it's the opposite swing of temp that causes an increase reaction.

You mentioned both arms: Is it in the same area of each arm? How big of an area...and has the area increased over the years?

Mine is the typical lace looking appearance of livedo. It did fade slightly after starting Cardizem, but now it's just as bad as it used to be.

That is so strange that it's brought on by the water up north...yet no one else has a problem. I wonder how the Plaquenil would help it...the mechanics behind it?