Hi Nancy
mine has mirroed from my right leg to the left,,even the original site[small cut on r-heel] is where it started on the left leg,,then consumed the left leg ,migrated,,,Good advice is to not wig out,,everytime i did,,it made it worse,,,its hard to stay in a calm state of mind when you see it spreading ,,but it does calm my flares down when i stay busy and stay calm,,good luck with you,,maybe its not rsd,,my hope and prayers are with you as well as with everyone here ,,,,,,,,bobber