The hedgehog rolls into a spiny ball to protect its soft belly. Dream tradition reads it as defensiveness, sensitivity behind a prickly front and a need to feel safe before opening up.
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.