Walls that seep red are read as pain soaking through the structures meant to keep you safe — home, family or routine. Dream books see it as hidden hurt that can no longer be contained.
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.