I am so glad this topic came up! Only the last two weeks have I had the freezing feet. One time I took two vicodins for the pain (usually only one) also Benadryl, also heating pad, electric blanket and husband gently massaging. It took two hours for me to quit hurting so I could sleep. My doctor has not finished testing me so she is unsure if it is sfn, but a doctor ten years ago said it is. But the cold cold feet is new and I am glad to know that might indicate a real diagnosis finally. Thanks!