But what exactly is brain fog, and is it limited to COVID? It is what it sounds like Brain fog is not a medical diagnosis, but rather the description patients tend to use for their symptoms.
Brain fog is what doctors refer to as “cognitive dysfunction". This describes problems with closely linked tasks such as concentration, information processing, memory, thinking and reasoning, and making sense of language.
Brain fog is exactly what it sounds like: a feeling something like being shrouded by a thick fog, not quite able to grasp ideas, feeling confused or disoriented, and having trouble concentrating or recalling memories.