While its normal for most people to once in a while drift into daydreaming in some it can be a serious health concern. Known as maladaptive daydreaming, in such people day dreams tend to become intrusive disrupting their everyday tasks and quality of life.
All of us have at some time experienced that very pleasant if unreal drift into thoughts or fantasies far removed from the hard realities of our immediate surroundings or activity. This is normal and may even be beneficial as a coping strategy, that gives us a very uplifting illusion of engaging in a desired activity or achieving a goal. Daydreaming is believed to be the product of a collection of brain regions known as the default mode network.
Excessive daydreaming, first defined by Professor Eli Somer in 2002 as maladaptive day-dreaming, can, however, interfere with your normal functioning at work or in relationships. The professor reasoned that such daydreaming could be because of trauma or abuse.
For more read Maladaptive daydreaming: Symptoms and management