A pimple is read as something irritating surfacing that you would rather keep hidden. Dream books link it to self-consciousness and small frustrations breaking out. A pimple on the face before an important event points to worry about how others see you. Squeezing it is read as wanting to get rid of a problem quickly, even if it leaves a mark. Many pimples suggest a build-up of small stresses that finally show.
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.