"Набегавшись" in a day, in a dream the brain continues to work. Being in a phase of a REM sleep, the person sees dreams. If to wake up right after this phase, the chance to remember a dream is high. Anyway, with time pro-procession the dream is erased and remains in memory only fragmentary.
The question of the nature of a dream and its plot concerns minds of scientists long ago. Very few people can unambiguously tell why the person dreams any given dreams. Assume that at night information is ordered, postponed from short-term memory in long-term, "on boxes".
While you sleep, your brain solves your problems which accumulated in a day. Therefore say that tomorrow is a new day. If, for example, you about something strongly worry, it is enough to get enough sleep properly to facilitate perception of a situation. During sleep the brain will manage to consider a task and to resolve it, or just to postpone in that box which adjoins to daily occurrence a little. To hide behind the scenes.
In a dream the brain processes information obtained not only a conscious, but also unconscious way. This process finds the reflection in dreams. A disturbing signal are lyutsidny, i.e. conscious dreams when the person has a dream and at the same time knows what sleeps. It says about the high level of uneasiness and that even in a dream you want to control a situation. Such dream is defective. Cause much controversy the so-called "prophetic" dreams preceding any given event in reality. What to consider them – coincidence or he is familiar from above? Constantly thinking of something important and significant for you, you anyway look in the future, draw some scenarios in imagination. In a dream you just continue to be engaged in the same, but already at other level, deeper. The dream which came true in reality can speak about high analizatorsky qualities of your brain, ability to capture one look general "strategy" of the events. It is good if at night you see quiet, interesting and joyful dreams. Support in yourself this state if it so. The calls prompting about need to prick up the ears and something in life to change, nightmares and bad feelings after awakening are. It is worth thinking if regularly you have the same dream or you wake up with mad pulse, sensation of fear or suffocation.