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 - Threads
If you dream of threads then you will be caught up in unpleasant situations, whereas if you dream that you are untangling yourself from threads then you will be freed from some problems.