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. …

May 2, 2024 · Nightmares can affect anyone, and when frequent, can harm sleep and daily life. Learn about nightmares, their causes, & how to reduce them.

May 1, 2025 · Nightmares aren't just for children. WebMD explains why adults may have terrifying dreams and the physical and emotional stress they can cause.