Felling guilt or remorse for what you said.
You should choose wisely your words.
This dream can reveal that you are having issues at the moment of expressing your emotions and feelings to others. It may also indicate that you are preventing yourself from expressing what you want; maybe there is a lack of good communication skills.
In some cases, a bite in your mouth may reveal a harmful and nasty self-criticism. Indeed, this dream may be subtly indicating that the dreamer herself may be harboring harmful thoughts or feelings that may hurt her self-esteem.
This dream could also mean a strong and constant remorse and guilt over certain words or statements said recently by the dreamer. Maybe your dreaming mind is telling you should be more carefully with what you say, and choose wisely your words.