The shin is the front of the leg that takes the knocks, so dream books read it as exposure to small blows along the way. A bumped shin stands for obstacles met head on.
Does the traditional reading fit your dream, or did it mean something else to you?
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.