Is it possible for a small space heater to cause mottled skin around my ankles? The discoloration occurs on the right side of each ankle, the same side I keep the heater on. It doesn t hurt and is not uncomfortable at all. Just looks terrible. I have sustained no injuries. It came on suddenly and has persisted since March (although I ve used a heater under my desk for 2 years). Sometimes it s worse than usual. The color ranges from rust to purple and varies day by day. Discoloration is in a spidered, vein-like pattern. The space heater is the only thing that would remotely explain why it appears on the inside of my left ankle and outside of my right ankle. I have heard that heat can cause mottled skin. Is the heater I use in the office my issue? And will it fade? Thanks!