I still have 12 days to go before my first appointment with my eurologist and I wanted peoples impressions of "brain fog". My feelings of this are extreme light headedness, not everyday, but for 4-5 days and then it stops. when I'm feeling like this , I feel really doppy like I'm on some kind of drug. My comprehension and thinking processes are very slow and I'm extremely frustrated. I'm just worried that it may not be low test that's causing this. I just don't know what the typical "brain fog " feels like. I'm 48 and seem like my low t sympoms have gotten worse in recent months. Until I have my appointment, I can deal with low energy, poor libido,mood swings and increased stomach fat, but this " fog" is scary. Like I mentioned, when it happened before it lasted for about 4 days. I'm on my 5th day now and hating this feeling. Thanks for your input.