I use a few different things to help with the warmth for my left foot/ankle. I use those foot warmer and hand warmer packs you can buy during the winter...the hand ones are usually cheaper than the foot ones and they work...but the foot ones are more comfortable. I also use heat wraps like the thermacare ones but usually the generic ones as they are cheaper...I like the neck wrap ones to use on my ankle and knee (and arms and shoulder)...they stay better than the rectangular ones in my experience. But when I can't wear a shoe or deal with the touch of even the heat pad or anything else...I use a good old fashioned space heater. We keep the house pretty warm for me anyway...but the space heater helps a lot too. All of these things keep the temperature of my leg/foot up but still allow me to move around and do stuff (space heater limits me to whatever room the heater is in...but it's also portable. I don't get to use that as much anymore because of the baby...but the other stuff works great still.