I got the nerve block in my back for the RSD in my left foot. It seems to be helping the swelling.. My foot dosent get all red a swellen anymore. I have my follow up today. They also gave me a cream to num my foot... 1% ketamine .5%creAM... I think the cream might be working also to help with the pain I have. I have bone tendon and nerve problems as a result of bunion surgery..