TweetThere are a number of tests to take to check thyroid production. I have Hashimotos thyroid disease and have been able to manage me levels without taking any thyroid meds. The only way to tell if he may have Hashimotos is by getting the thyroid anti bodies tested. You can still come up with normal tsh, t3, t4 etc and have high antibodies, indicative of autoimmune thyroid disease. I have compiled a lot of info on this and I also know that so many things can affect the thyroid with the thyroid problem being secondary to the primary cause. It is a puzzle to find out sometimes. Keeping our sex hormones stable, has a lot to do with thyroid function too..