Your child may have only a few scary dreams a year, or be troubled by nightmares much more often. To be nightmares, bad dreams need to be vivid experiences that make you feel sad or scared. Nightmares take place during the REM (rapid eye movement) phase of sleep, usually after you've been asleep for several hours. Bad dreams are unpleasant dreams and they do not awaken you.
Bad dreams are common among children and the frequency of their occurrence decreases, as one grows older. Bad dreams are caused by an unstable emotional state. Bad Dreems (stylised as Bad//Dreems) are an "outsider rock" band from Adelaide, South Australia.