With hyperthyroidism, what causes the inability to focus and how do you get rid of it?

Hyperthyroidism: You correct the inability to focus by lowering your thyroid level back into the normal range. You can't focus with hyperthyroidism because 1) you are tired all the time, 2) you might not sleep well with hyperthyroidism so you are tired all the time, 3) your mind is too active so you have too many thoughts going on at the same time...It's similar to taking a high amount of caffeine...