Thirdly I am going to give you some examples of dreams and what they might mean. Dreamss are also considered to be a way of getting rid of all that useless information. No one really knows for sure but everyone is coming up with many theories. Normally if you have a bad day then that night you will probably end up having a bad dream that night because your emotions are going wild and it all can't stay contained in your head. Normally dreams can turn out to be quite traumatic for people due to the fact that they stress about what the dream was suppose to mean or if the dream is going to really happen.
People just think about their dream is suppose to mean and they get fustrated.
Just like when a person is happy they tend to have a good dreams. If you have a reoccurring dream that tends to be unpleasant because it is trying to represent someting that needs to be taken care of because emotionally you are upset by something and your dream could be focusing on your problem and stress you out even more. So basically science not pschiatry are really cartain if dreams have an emotional purpose or if they are completely by chance. Many people argue about it because know one really knows for sure. Maybe dreams will just be a mystrey wntil we get some more technology.