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  1. Nightmare - Wikipedia

    A nightmare, also known as a bad dream, [1] is an unpleasant dream that can cause a strong emotional response from the mind, typically fear but also despair, anxiety, disgust or sadness. …

  2. Why We Have Nightmares (And How to Prevent Them)

    May 2, 2024 · It’s normal to occasionally have a nightmare or bad dream, but for some people, they recur frequently, disrupting sleep and negatively impacting their waking life as well.

  3. Nightmare disorder - Symptoms and causes - Mayo Clinic

    Jun 5, 2021 · A nightmare is a disturbing dream associated with negative feelings, such as anxiety or fear that awakens you. Nightmares are common in children but can happen at any age.

  4. 7 Reasons You’re Having Nightmares

    May 22, 2024 · What causes nightmares? “Most people have a random nightmare here or there, and you may be more susceptible to them after dealing with stress or watching a scary movie,” …

  5. Nightmare Disorder: What Causes It and How Do You Manage It?

    Jun 20, 2024 · Having persistent nightmares that cause distress may be a sign of nightmare disorder. Here's all you need to know.

  6. Adult Nightmares: Causes and Treatments - WebMD

    May 1, 2025 · Though it's possible, it has not been confirmed whether this cycle could lead to nightmare disorder. There can be a number of psychological triggers that cause nightmares in …

  7. NIGHTMARE Definition & Meaning - Merriam-Webster

    Because it was believed to come in the night, it later became known in Middle English as a nightmare. It was not until the 16th century that the word nightmare came to mean "a …

  8. Nightmares - Psychology Today

    Apr 26, 2022 · A nightmare, if one occurs at all, usually takes place in the later hours of REM, or rapid eye movement, sleep. A dreamer often awakens with a solid general recollection of the …

  9. Nightmare | Definition, Causes, Prevention, & Facts | Britannica

    nightmare, disturbing dream that provokes a strong negative emotional reaction. Nightmares differ from other dreams in that they typically cause the sleeper to awaken because of emotional …

  10. Nightmare Disorder: Symptoms, Causes, Treatment, and Prevention

    Dec 23, 2021 · Nightmare disorder, also called dream anxiety disorder, is a rare type of sleep-related disorder (parasomnia) affecting about 4% of adults, causing distress and sleep problems.