Have you had allergy testing? I did when my skin and eye problems were happening to rule out an allergy as a cause. I never have had allergy shots. Are you nervous to get the shot due to the rsd? Is there another med that could help they could try? I know for me I had doctors guess at me so was given nose spray and also antibitoics for my ears. Both which were not warranted and the nose spray made me worse. I am not saying this would happen to you just my experience and sometimes how I feel doctors guess. I hope you feel better