One way to characterize brain fog is slow or sluggish thinking. Another might be
the feeling of being spaced out or a lack of focus. There are many different reasons why someone may experience brain fog. It could be from a high amount of stress, a poor night of sleep, or side effects from various medicines. Most of the time brain fog gets better on its own and is not a long-term challenge. In contrast, there are times where it may last longer and influence various parts of the brain including your attention and memory.