oh, one more thing! i had NO color or temperature changes until a July 2007 flareup--well into my totally crappy RSD period--when my foot turned dark purple and was very cold (now i alternate between cold and hot during flareups). silver lining of this: after six years of skepticism, my dad finally truly understood that i was in pain! as excruciating as it is, the color changes are at least a way to stick it to the cynics. invisible diseases are hard. my mom has fibromyalgia, and i'm sure she sometimes wishes she could show a visible symptom to people who are rude about her being tired.