Test of thyroid function
As there are no definitive brain scans or blood tests that can accurately diagnose bipolar disorder, physicians order lab tests and conduct physical examinations to rule out other conditions that could be causing certain behavioral symptoms. Urine analysis and thyroid function tests are essential for the accurate diagnosis of bipolar disorder because they serve to identify other factors that cause mood changes. A thyroid function test assesses the health of the thyroid gland, as hypothyroidism can induce depression and contribute to mood disorders.
