What would cause someone to feel a brain fog?

You may be dehydrated, or need an infusion of glucose. I often feel like that when I wake up. Drinking water usually helps.

Low blood sugar, low blood pressure, being sick

Could be anything or many things all at once - poor diet, irregular sleeps, medications, dehydration, etc.

if it persists, you need to get checked out. could be epstein barr but i am not a doctor.

Allergies , feeling run down and stressed ?

Wow, lots of things. Not enough sleep, poor nutrition, recent exposure to cyanide gas, allergies, those brain altering microwaves the Chinese have (not) been working on. Have you tested for Radon..?? What about Lead?

I don't know, for me it's apparently "existing". 🙄

biden virus? 🤔

There's a fentanyl epidemic these days maybe some of it got on ya in the breeze. 🌬️

ngl the main cause imo is stress/depression

Years of drinking does that to me

Me too… but I took zzzquil

Have you had Covid? These are recognised longer lasting symptoms.

Probably getting sick

Eat something

More u sleep the tired u b. It's like eating too much turkey