What are nightmares?
Nightmares are pretty much just scary versions of regular dreams. They do have one purpose though, to wake you up. You can usually recall the dream after you wake up.
Did you know that there's another type of nightmare experience? It's called a night symptom. It usually happens in the first few hours of sleep. It's not a real dream; it just wakes people up terrified! Symptoms usually include pressure on the chest and extreme fright. BEWARE!!!