A blow to the head is read as a shock to how you think — news or an event that has left you dazed and struggling to make sense of things.
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.