I have trouble losing weight, even though I eat healthy and exercise regularly. How do I know if I have a thyroid problem?

Start with tests but. It is possible that you're hypothyroid, esp. If you also have fatigue, dry skin, constipation, feel cold or have other common symptoms. Ask for thorough testing- most docs screen with a TSH only but many who need thyroid have a normal tsh! ask for a free T3 (liothyronine) & free T4 & thyroid antibodies. It is possible to be hypothyroid with "normal" blood tests if you have type 2 hypothyroidism. See comment:.