TSH test: checking thyroid function at midlife

A TSH test is a blood test that measures thyroid-stimulating hormone, which the pituitary gland makes to control the thyroid. It is often the first test used to check whether the thyroid is underactive or overactive. Some thyroid symptoms — tiredness, weight change, mood changes, heat or cold intolerance, period changes — can resemble perimenopause, which is one reason a clinician may check it.

What the test measures

TSH tells the thyroid how much thyroid hormone to make. A high TSH can suggest an underactive thyroid (hypothyroidism); a low TSH can suggest an overactive thyroid (hyperthyroidism). Clinicians often add T4 or T3 tests to understand the picture.

Why it matters at midlife

Thyroid conditions are more common in women. Because symptoms can overlap with the menopause transition, testing can help a clinician tell them apart rather than assuming every change is hormonal.

Before the test

• Usually no special preparation is needed.
• Tell your clinician about medicines and supplements — some, including biotin, can affect thyroid test results.

When to talk with a healthcare professional

• You want to know whether a test is right for you, and when.
• You have a result and want to understand what it means for your health — your clinician interprets results in the context of your history.

How Dot can help

Dot can help you keep track of symptoms and questions to bring to your appointment. Dot does not order or interpret lab tests; for clinical care, Kindr Care connects you with licensed clinicians.

How Dot works · Kindr Care clinical care

Related topics

• Perimenopause
• Energy & fatigue
• Brain fog
• A1C test
• FSH

Sources

1. MedlinePlus, U.S. National Library of Medicine. TSH (Thyroid-stimulating Hormone) Test.
2. National Institute of Diabetes and Digestive and Kidney Diseases (NIH). Hypothyroidism (Underactive Thyroid).

This page is educational and not medical advice. Dot does not diagnose or prescribe. See our editorial policy.