Good Evening I am still new to RSD ( broken arm 12/9/13) but I have had three ganglion blocks with good results. I went by what my doctor had told me to do, "he told me if I had no improvement within three days go back and get another ganglion block". I have to say I have been nervous about the shot but for me so far it has helped. I still have stiffness in my right hand and some discomfort but definitely not as bad as it was. I just pray that the shots work each time for me. Good luck