Does anybody here have any helpful advice on what is a common physiological reason that can be tested to see if it is causing a baseline high level of anxiety? I don't have panic attacks and I am very good about practicing relaxation techniques, but I can't ever truly be relaxed. I understand that there is the possibility that it is just a cognitive thing, but I'm just wondering if there are some common tests to ask about. I've happened to notice in the past that during blood checks, I have a somewhat low thyroid level. It's within normal range, but it's at the very bottom. Could this be a cause?