Hi, Just diagnosed with RSD. My toes and feet act the same way as yours. They can be blue or red and wither hot or cold. They can be the same or different. I took pictures of my feet to bring to the vascular dr. I was shocked to see how red one could be and ashen or gray for the other one. They can also be blue. My hands are similar. There are times that either my hand or feet are burning they are so hot or ice cold and can be used as ice packs. What meds are out there to help control the symptoms and the progression.