A poultice, the old folk remedy, is read as drawing something harmful out to the surface. Dream books link it to slowly bringing a hidden problem into the open so it can heal.
Where in your waking life have you met something like this lately?
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.