Nightmares can feel intensely real and leave a lasting impact, extending into waking hours. Experts in sleep research are now shedding light on the causes of these disturbing dreams. They aim to help individuals understand the underlying reasons for experiencing nightmares. While the precise causes vary, understanding these factors is the first step toward managing them. The research explores what triggers these unpleasant dreams and how to cope with their effects. Ultimately, the goal is to empower individuals to “rewrite” their nightmares for a more peaceful sleep experience and improved daytime well-being.