Brain Fog feels like being disoriented. Many refer to it as a curtain that covers their brain and they can’t think right. They have a blurred mind and their judgment is less sharp than it used to be.  Cognitive and memory failure is one of the primary symptoms, but many people also say that they feel physically tired that makes them avoid working and even going out of their home. It feels like a massive shut down of your mental abilities, mood, and competency to resolve problems at work.