A TSH blood test measures thyroid-stimulating hormone levels to assess how well the thyroid gland is functioning. It is commonly used to detect hypothyroidism or hyperthyroidism and to monitor thyroid treatment. The test requires a small blood sample, either drawn at a lab or collected at home with a finger prick. Results provide insight into whether the thyroid is underactive or overactive. The TSH blood test is a standard, reliable, and essential tool for maintaining long-term thyroid health.
