Read symbolically, losing a head stands for a split between thinking and feeling, or for a loss of control and authority. Dream books also see it as the cutting off of a dominant way of thinking that has run its course.
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.