Nightmares are scary or disturbing dreams and can range in their effects from in-the-moment discomfort to long-term insomnia and difficulty with daily function. Nightmares are most common in children; however, adults may also suffer from nightmares. Recurring or intense nightmares are frequently associated with post-traumatic stress or other unprocessed traumas, and there are many therapies and practices that are aimed at reducing their frequency and intensity, from guided visualizations to aromatherapy to brainspotting.