What is a nightmare

Nightmare is suddenly was awakened by a nightmare in his sleep, and can clearly remember the content of the nightmare.generalThe childChild after heard horror stories or seen a horror film, easy to happen in late.Part of the adults in stress after the event, such as experienceThe earthquakeAnd sinking has to meet nightmare after catastrophic events.Because the uncomfortable sleeping posture, oppression, certain parts of the limbs or the use of sedatives will induce nightmares.