When weight problems begin, you might suspect that the thyroid gland may be at fault. You may have noticed other symptoms, such as a fatigue, diminished sex drive, mood swings, constipation, dry skin, hair loss or feeling cold. But when you go to the doctor, you get a standard “TSH” test and are told everything is fine. As an endocrinologist, I’ve seen this many times. The truth is you still could have a thyroid problem.