Nightmare facts for kids
A nightmare is a very strong and often scary dream. It can make the person sleeping feel upset or frightened. Nightmares usually happen because of things like a high fever (a physical reason) or stress or a bad experience (a psychological reason).
Having nightmares is common. But if someone has nightmares very often, it can make it hard for them to get enough sleep. Sometimes, people might need to talk to a doctor about it.
Nightmares usually happen during a part of sleep called REM sleep. This is when your brain is very active, and you have your most vivid dreams.
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Where the Word Comes From
Long ago, people did not understand dreams scientifically, so they created legends to explain them. In European myths, people talked about the "mare" (also spelled mære in old stories). This was an imaginary creature in Germanic folklore and Slavic folklore. People believed it sat on a sleeping person's chest to bring frightening visions.
Old tales also connected these night terrors to magical spirits called Divs or a wicked hag. By the year 1829, the word "nightmare" changed from a mythological creature to mean any scary dream. Today, people also use the word as a metaphor for any chaotic or difficult daytime situation.
What Causes Nightmares?
Scientists know that scary dreams can have physical and emotional triggers. Physical causes include sleeping uncomfortably or having a high fever. Eating heavy foods right before bedtime increases body activity, which might prompt confusing dreams. However, the popular idea that eating cheese causes nightmares has very little scientific proof. Watching scary movies from the horror genre right before bed can also trigger bad dreams.
Feelings play a huge part in how dreams unfold. Stress and everyday worries can lead to troublesome thoughts at night. In fact, research shows that difficult life events often lead to more frequent nightmares in children. A bad dream usually happens during REM sleep, which is the stage of rest where vivid dreaming occurs. When someone wakes up from REM sleep, they usually remember the dream clearly.
Nightmares in History
For a long time, people had different ideas about what caused nightmares. In earlier times, some people believed that nightmares were caused by demons. They thought a creature called an Incubus would sit on the sleeper's chest, making them feel like they couldn't breathe. The famous painting The Nightmare by John Henry Fuseli shows this old belief. Some people even thought magic or demonic possession was involved.
In the 19th century, people started to think that what they ate was the cause of nightmares. For example, in the famous story A Christmas Carol by Charles Dickens, the character Ebenezer Scrooge thinks his bad dreams are just because he ate too much. He blames "an undigested bit of beef" or "a crumb of cheese."
Back then, books like the Household Cyclopedia (from 1881) gave advice on how to avoid nightmares. They suggested eating healthy foods and avoiding fatty or greasy meals. They also said that getting enough exercise helps with digestion. The book also mentioned that going to bed too early or too late, or not getting enough sleep, could lead to nightmares. It warned that sleeping in too long in the morning could also make nightmares happen more often.
How Doctors Help
Doctors study sleep closely to help people who experience frequent nightmares. If terrible dreams happen often, they can cause insomnia, which makes it hard to sleep at all. This sleep problem is sometimes called a parasomnia or a nightmare disorder.
People can learn helpful tricks to cope with frightening dreams. An expert named Stephen LaBerge studied how to direct dreams using lucid dreams. Another popular technique invites dreamers to imagine a new, happy ending to a scary story while awake. Thinking of a peaceful ending before bedtime can train the brain to feel safe, calm, and ready to rest.
See also
In Spanish: Pesadilla para niños
