An itch is read as restlessness, desire or an irritation you cannot ignore. Folk sayings give it meaning too: an itchy palm or foot speaks of a wish to move or act.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.