Recently I have changed my diet rather drastically, I m eating much better, and I m working out. I ve done a lot of things to improve my health but now I notice when I m working out or doing physical activity part way through or after I get a pressure behind my eyes and in my head. It makes it hard to focus, think, do much of anything. It s not what I would call a head ache but it takes the whole day to shake. Nothing food wise thwarts it that I ve found. I m about 210 36yrs/old 6 0