An aching ear is read as words that hurt to hear — criticism, gossip or news you would rather not take in. It can also point to hearing too much noise from too many people.
Has this come up in your dreams before? What was going on in your life then?
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.