The mouth is read as expression — what you say and what you hold in. Being unable to speak traditionally stands for something that wants to be said, or for a fear of not being believed. A sewn or covered mouth is linked to silence imposed by others, while shouting without sound is one of the most common dreams of feeling unheard. Speaking with ease points to confidence and clarity. Food in the mouth that cannot be swallowed is read as words or situations you find hard to accept. The dream may point to a conversation still waiting to happen.
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.