I Have Had Some Problems With Severe Burning In My

I have had some problems with severe burning in my feet causing blistering when they get warm for the past couple of years wich my doctors are still trying to figure out. Now I'm also having a problem with my hands and get turning purple when cold. Recently I noticed that when my hands hey cold my fingers get all wrinkly like as if they had been in water for a long time and when I press on the bottom of my feet the indent stays there for a long time. Could you tell me what I'm looking at here. I also have ankylosing spondylitis