Swollen cheeks are read as words held in the mouth and feelings puffed up with nowhere to go. Mumps also tends to carry the mood of childhood.
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.