Warts are read as small flaws you notice more than anyone else does. Folk tradition, full of wart charms, also sees them as worries that vanish once you stop fixating on them.
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.