To ask what this brain fog is?

[Hallb]

I like to think i’m a reasonably intelligent person. For years I have had some mental block.
Say I went for a job interview, I would be asked a question, I would know how to answer but my brain feels so foggy, I just cannot put together any thoughts or coherent sentences together.

I actually gave up studying because I knew the tasks at hand but I just could not grasp the ideas, my brain starts wondering and I tune out basically. It makes me feel very stupid and disappointed in myself because I feel like my potential is there yet i’m not doing anything with it. What could it be? Sometimes my brain feels foggy in day to day and I feel overwhelmed

A relative has been struggling with brain fog. We all through it was early signs of dementia or similar. She went to the doctor and it turned out she had VERY VERY high blood pressure. They called an ambulance and whisked her off to A&E. It was 200+ over another high number.

High blood pressure can contribute to brain fog. So if you haven't taken your bp for a while, then perhaps consider doing this.

She had no other symptoms of high blood pressure at all. It was a complete surprise to her.