Quote:
Originally Posted by someone
[Is it] possible that seasonal allergies such as birch pollen allergy causes brain fog?
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There are many alleged
causes of clouding of consciousness (a.k.a. brain fog/mental fog). So many that I'd be looking beyond birch pollen allergy.
Viruses can sometimes have/leave after-effects lasting far longer than the virus itself.
How old are you?
You might also pursue the
Searches related to causes of brain fog at the bottom of the first page of links.
Doc