Patches of thickened skin are read as defensiveness building where you have felt exposed. Dream books also tie them to worry about being judged on appearance.
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.