The brain is the crowning organ of the human being. Therefore, dysfunctions involving it are always important. Brain fog is one of the most important symptoms or conditions today, although it is not listed as a diagnosis or recognized health condition in most medical or psychological textbooks. Brain fog may be described as feelings of mental confusion or lack of mental clarity. It is called brain fog because it can feel like a cloud that reduces your visibility or clarity of mind. It can cause you to become forgetful, detached and often discouraged and depressed.