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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. 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 …

  3. Why We Have Nightmares (And How to Prevent Them) - Sleep …

    May 2, 2024 · Frequent nightmares that interfere with daily functioning, mood, or sleep, may indicate a nightmare disorder. What causes nightmares is unknown, but it may have to do with …

  4. 7 Reasons You’re Having Nightmares - Cleveland Clinic Health …

    May 22, 2024 · In the U.S., 2% to 8% of people experience nightmare disorder, a condition categorized by nightmares so vivid and distressing that they affect their quality of life.

  5. 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 …

  6. Adult Nightmares: Causes and Treatments - WebMD

    May 1, 2025 · When you wake up terrified from a disturbing nightmare, you might think you're the only adult who has them. After all, aren't adults supposed to outgrow nightmares?

  7. Nightmare Disorder: What Causes It and How Do You Manage It? - Healthline

    Jun 20, 2024 · Nightmare disorder is a sleep-wake disorder, but it’s also considered a mental health condition because it can cause significant psychological distress and impairment. How …

  8. Nightmare Disorder: What It Is, Symptoms & Treatment - Cleveland Clinic

    Nightmare disorder is a pattern of repeated dysphoric, frightening and vivid dreams that cause significant distress or impaired functioning. Nightmare disorder is treatable.

  9. 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.

  10. 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 …

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