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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 · Nightmares are vivid dreams that may be threatening, upsetting, bizarre, or otherwise bothersome. They occur more often during rapid eye movement (REM) sleep, the …

  4. 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 …

  5. 7 Reasons You’re Having Nightmares - Cleveland Clinic Health …

    May 22, 2024 · Studies show that 1 in 20 people experience a nightmare at least once a week, and some people have them even more often. In the U.S., 2% to 8% of people experience …

  6. Adult Nightmares: Causes and Treatments - WebMD

    May 1, 2025 · Nightmares are vividly realistic, disturbing dreams that rattle you awake from a deep sleep. They often set your heart pounding from fear. Nightmares tend to occur most …

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

    Jun 20, 2024 · Nightmare disorder, also known as dream anxiety disorder, is a type of sleep-wake disorder called parasomnia. Parasomnias involve patterns of sleep disturbances featuring …

  8. 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 …

  9. Nightmares: Causes, Bad Dreams Signs, Warnings & Treatment - MedicineNet

    Jul 31, 2023 · What are nightmares and what do they mean? Nightmares are vividly realistic, disturbing dreams that can disturb sleep that can create fear, palpitations, and rapid breathing. …

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

    Nov 21, 2022 · Nightmare disorder is a pattern of repeated dysphoric, frightening and vivid dreams that cause significant distress or impaired functioning. Nightmare disorder is treatable.

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