"Cut constantly, the reason is still chaotic", and hair often indicates trouble. In your dream, you shaved your hair, and you are tired of your present life. The process of shaving your hair represents your determination, indicating that a problem has been solved, or that you have been freed or given up from your heart.
Dreaming of becoming a monk indicates rebirth or improvement, indicating that your mind or soul is eager to break with the past and start a new way of life.
Recently, you may have encountered something of great significance or influence to you, which changed your inner will or future decision.