Dream about mucus coming out of mouth is a premonition for insecurities about your physical abilities. You are trying to take back what you have said. You feel that your voice is being muffled. Your dream is a hint for renewal and fertility. You need to be less passive and stand up for yourself.
Mucus coming out of mouth dream is an indication for anxiety medication that you are considering taking. You need to deal with issues that you have been avoiding. You have a tendency to ignore things until it is right in front of you. This dream suggests a sense of powerlessness. You need to appreciate the different experiences in your life even though they are not what you may be accustomed to.
If you dreamt about mucus coming out of mouth:
Even if everyone knows of your relationship with a certain person, they certainly do not realize how deeply in love you actually are, and perhaps you do not either until an event that occurs today makes you realize exactly what is going on. You may choose to keep this a secret a while longer.