My mother has been on a low sodium diet since the 80's. My mother has been forgetful since 2007. Confusion started last month and went away for 3 weeks and recently came back. She is tired everyday and she gets nauseous. She just came back from the doctor. Her sodium level is just a little low. Could that cause her symptoms of confusion?
By the way, never let medical personnel shame you about doing online research. Sometimes routine matters are overlooked, and a good dr will be glad to know you are involved and concerned.
But instead of researching alternative causes of dementia symptoms and trailing in there with them, one after another, first of all *ask* this doctor to explain his reasoning and see if it makes sense to you.
If you're still not satisfied that he is treating your mother holistically - which any good GP aims to do, even if they don't talk about it in those terms - then by all means find one who will.