Thanks all for your replies!!! And for the pernio definition, Maxine! I'm currently working on getting all my records, including films, x-rays, etc. Talk about a process! I hope I can get it all done by Friday. LOL Has anyone had to get slides of their biopsies?!?! Is this even possible if it's been over a year? Ugh. Thankful, thanks for all the excellent info on peripheral vasoconstriction. I'll have to look into that all further. I never made a connection between my summer and winter symptoms! Very interesting! My feet were always swelling and turning red this past summer. I kept hiding them. You know, the curious thing is that I do not suffer from Raynauds. My daughter (age 6) was diagnosed last year, though. I only have pernio symptoms. From what I understand (and I'm still trying to figure it out), the blood vessels constrict during cold conditions and then cause the blisters and redness upon 'thawing.' This is usually about a 12 hour process for me so it doesn't always show up right away. But I get really cold easily. For those of you wondering about the difference between pernio and Raynauds, I'm not entirely sure what the clinical difference may be. I can tell you based on the experience in our household. My daughter had a diagnosis based on symptoms. Her feet go from ghost white to pink to black/purple progressively. For me, pernio is painful because the blood escapes through the skin and presents itself as redness, blisters and even pustules. I can't even walk when it gets too severe. I wear mittens and boots as soon as the temperature drops below 60 degrees. BTW, I had extensive testing done after the pernio diagnosis and they determined that my pernio was not caused by an underlying illness (ruled out Autoimmune, blood disease, cancer, Lupus, etc.) Now, I'm not so sure. I'm thinking it is related to some type of dysautonomia. Pernio can be secondary to Lupus but usually presents itself in the form of a rash on the face and nose area.