Thyroid Symptom Checker
Free thyroid symptom checker — tick your symptoms to see if they point towards an underactive or overactive thyroid, and when to get a TSH blood test.
Underactive vs overactive thyroid
| Underactive (hypothyroidism) | Overactive (hyperthyroidism) |
|---|---|
| Tiredness, weight gain | Weight loss, hunger |
| Feeling cold | Feeling hot, sweating |
| Constipation | Frequent stools |
| Dry skin, hair loss | Shaky hands, fast heartbeat |
| Low mood | Anxiety, poor sleep |
| Heavy periods | Light or fewer periods |
Thyroid problems are common in women — especially after pregnancy and after 60 — and the symptoms overlap with stress, anaemia and menopause. That is why a TSH blood test is the only way to know. This checker shows which pattern your symptoms fit and whether you should ask for a test. It cannot diagnose thyroid disease.
Already diagnosed? See the thyroid diet plan. Tired and pale? Also try the anaemia symptom checker.
Frequently asked questions
Which test checks thyroid function?
TSH (thyroid-stimulating hormone), often with free T4. High TSH usually means underactive; low TSH usually means overactive.
Can thyroid problems cause weight gain?
An underactive thyroid can cause a few kilograms of weight gain, partly fluid. Treatment usually helps; the rest responds to normal diet and exercise.
Should thyroid be checked in pregnancy?
Many doctors check TSH early in pregnancy, especially if you have symptoms, a family history or an autoimmune condition, because thyroid levels affect the baby.
Sources: American Thyroid Association: Hypothyroidism · NHS: Overactive thyroid
Reviewed for accuracy against the sources above. This page is general information, not medical advice — talk to your doctor about your own health.