I have been tested several times for thyroid function. The blood tests reveal overative thyroid and then after being tested few months later my thyroid function is fine. I've even had a thyroid sonogram and other tests that revealed that it was working properly. I recently had someone tell me that I should be tested for Hypoglycemia because there may be a connection. I have a lot of the symptoms of Hypoglycemia (overweight, heart palpitations and tremors to name a few) and very few of an overative thyroid. My brother has reactive hypoglycemia and I'm wondering if it heriditary? I'd appreciate any comments!!!