Pulling hair from your mouth is a common, uncomfortable dream, read as words that are hard to get out or a tangled situation that needs saying aloud.
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.