Nightmares
When people have horrible experiences of fear, pain, or violence, one of the many things that might keep happening afterward is having bad dreams. They can be the same dream over and over, they can be a replay of the horrible experience, or they not make any sense at all. They might wake you up with screams or cries, or you might be trapped inside them all night. They may also start a very long time after the bad experience. Nightmares also interrupt our sleep, making it hard to study or work the next day.