A mane is read as pride, vitality and how freely you show yourself. A flowing one stands for confidence; a tangled or shorn one for strength that feels diminished.
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.