Suggest Treatment For Itchiness And Burning Sensation In The Wrist

I recently had blood drawn and experienced an electric shock once the needle went into my forearm. The pain subsided on my upper arm; however, I am having burning and itching sensation on my wrist where it looks like the median nerve is. I believe I suffered nerve damage, but I am also concerned about RSD. If my upper arm seemed to have healed fairly quickly, will my wrist heal? I am very worried. I went to the walk in clinic and was prescribed Prednisone for inflammation. The pain, burning, and itching is nearly gone since I have taken my first prescribed dose of Prednisone.