Pressure in head, feeling like eyes are rolling back
Recently my brother in his mid 40's started feeling strange. Symptoms include, light headedness, difficulty concentrating, constant feeling like eyes are rolling back in head. He has otherwise always been athletic and healthy.
His routine blood tests are normal, cholesterol slightly high. Stress test normal. Tested negative for vertigo. They have finally ordered an MRI.
Has anyone else experienced this or have any theories? Any help would be appreciated as I am extremely worried.