In the world of dreams the rules of reality do not necessarily apply. Each dream is unique and it's a direct link to the soul and spirit. Psychology provides its own theories on what dreams mean, but so did tradition and the study of dreams for thousands of years before any relevant science had developed.
Dream Meanings - Desert
If you dream you are in a desert, this means not only that you are you going through a lonely patch but that you will be upset by developments in a personal matter.