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 - Hair
To dream of beautiful, well-tended hair means that happiness and a new love will come knocking at your door. Blonde hair means profits and a greater interest in your work. If you dream of thinning or short hair, this means worries await you but you will overcome them in time. Grey or white hair means that you must be a little more careful as you may have an illness but not one that is so serious as to make you worry.