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Renvo
Free symptom checker

Check your thyroid symptoms

Fourteen plain-English questions covering both underactive and overactive signs. It takes a couple of minutes, it's private, and it helps you work out whether a blood test is worth asking about.

Start the checker
Symptom checker

Check your thyroid symptoms

Thinking about the last six months or so, how often does each statement sound like you? Some point towards an underactive thyroid and some towards an overactive one — answer them all.

Before you start

This is a symptom checker, not a diagnosis, and it cannot measure your thyroid. That needs a blood test. Your answers stay on this page: nothing is saved or sent anywhere.

Call 999 or go to A&E if a swelling in your neck is making it hard to breathe, or you have a wheezing noise when you breathe.

  1. Statement 1 of 14I feel tired or sluggish, even after a full night's sleep.
  2. Statement 2 of 14I feel cold when people around me are comfortable.
  3. Statement 3 of 14I've gained weight without a clear change in how I eat or move.
  4. Statement 4 of 14My skin is dry, or my hair has become coarse, thin or brittle.
  5. Statement 5 of 14I'm constipated more often than I used to be.
  6. Statement 6 of 14My mood is flat or low, or my thinking feels slowed down.
  7. Statement 7 of 14I have muscle aches, weakness or cramps without an obvious cause.
  8. Statement 8 of 14I feel anxious, irritable or on edge more than usual.
  9. Statement 9 of 14I feel hot or sweat more than the people around me.
  10. Statement 10 of 14I've lost weight without trying to.
  11. Statement 11 of 14My heart races, pounds, or beats irregularly.
  12. Statement 12 of 14My hands tremble or twitch.
  13. Statement 13 of 14I struggle to get to sleep, or wake feeling wired.
  14. Statement 14 of 14I've noticed a swelling at the front of my neck.

0 of 14 answered

About this quiz

Is an online thyroid quiz any use?

A thyroid quiz cannot tell you whether your thyroid is underactive or overactive. No questionnaire can, because the symptoms are shared with iron deficiency, B12 deficiency, perimenopause, depression, sleep apnoea and simple exhaustion. Thyroid disease is diagnosed from a blood test, not from answers.

What a structured set of questions does do is make the pattern visible. Thyroid symptoms accumulate slowly over months, and because each one has an easy everyday explanation, most people never see them side by side. Ticking off eight statements in two minutes is often the first time the cluster becomes obvious — and a cluster is a much better reason to ask for a blood test than any single symptom.

This checker reports underactive and overactive patterns separately, because the two point in opposite directions and mixing them into one score hides which is which. Whatever it shows, the next step is the same: a blood test. Our guide to getting a thyroid test in the UK covers the NHS, private and at-home routes, and reading thyroid results explains the numbers once you have them.

The short answer

Why symptoms alone aren't enough

Thyroid symptoms are among the least specific in medicine. Tiredness, weight change, low mood and feeling cold describe an underactive thyroid — and also describe stress, low iron, poor sleep, perimenopause and depression.

That's why thyroid function is measured in the blood rather than inferred. NICE notes that a single symptom on its own may not point to thyroid disease, and advises against testing during an acute illness unless the illness itself might be thyroid-related, because it affects the result (NICE NG145).

Our guide to thyroid symptoms covers both directions in detail, and thyroid blood test results explains what TSH, T4 and antibodies mean once you have them.

Honest FAQs

Can a symptom checker diagnose a thyroid problem?

No. Thyroid function is measured in the blood, so no set of questions can tell you your levels. A symptom checker can only show whether your experience matches the pattern clinicians investigate, which helps you decide whether to ask for a test.

What test is used for thyroid problems?

A blood test, usually measuring TSH (thyroid stimulating hormone) and T4. Antibody tests are sometimes added to look for an autoimmune cause. One result is interpreted alongside your symptoms rather than on its own.

What are the signs of an underactive thyroid?

Tiredness, feeling cold when others are comfortable, weight gain, dry skin, coarse or thinning hair, constipation, muscle aches and low or slowed mood are the commonly listed symptoms.

What are the signs of an overactive thyroid?

Anxiety or irritability, feeling hot and sweating more, unintentional weight loss, a fast or irregular heartbeat, trembling hands, difficulty sleeping and sometimes a swelling in the neck.

Could these symptoms be something else?

Very often, yes. Stress, low iron, perimenopause, depression, sleep problems and several other conditions produce a near-identical picture. That is exactly why symptoms alone are not used to diagnose thyroid disease.

Are my answers saved anywhere?

No. Your answers stay in your browser while the page is open. Nothing is saved, and nothing about your answers or result is sent to us or anyone else. Closing or refreshing the page clears them.

Sources

The health information on this page is based on UK guidance:

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