The only difference between day dreaming and night dreaming is the facts that we are asleep. Dreams occur when the person is so relaxed that they pay no attention to what goes on around them. In our dreams we can find ourselves doing some pleasant thing, or enjoying a great triumph, or accomplishing something that we want very much. Night dreams are usually more unusual and unrealistic than daydreams, because in sleep people have almost no control over what they think. Night dreams can also express things that frighten us. This is because it is an emotion from inside the person of needs, wants, fears, desires and so on. The dream provides the opportunity for these to express themselves.
Interesting fact: During a night’s sleep a person may change positions as many as 40 times and have around live dreams.