Thyroid dysfunction is common — affecting roughly 1 in 20 adults — but symptoms overlap with many other conditions, making it easy to miss. This symptom checker shows you which thyroid pattern (hypothyroid vs hyperthyroid) your symptoms most closely resemble, and provides TSH reference ranges to guide your next conversation with your provider.
Thyroid Symptom Checklist
Check all symptoms you are currently experiencing:
HYPOTHYROID Symptoms (Underactive)
HYPERTHYROID Symptoms (Overactive)
How to Use the Thyroid Symptom Checker
The thyroid gland controls metabolism, energy, body temperature, heart rate, and many other body systems through thyroid hormones (T3 and T4). When it produces too little or too much of these hormones, symptoms appear throughout the body.
How to Complete the Checklist
Check each symptom you are currently experiencing or have noticed over the past 1-3 months. Checking multiple symptoms in one column (hypo or hyper) suggests a pattern worth investigating with your doctor. Many people have some overlap between columns, which is also diagnostically useful.
Next Steps After High Scores
If you score 4 or more in either column, request a TSH blood test from your primary care provider. This is a routine, inexpensive blood test. If TSH is abnormal, your provider will likely follow up with Free T4 and possibly Free T3 testing. Do not start thyroid supplements without confirmed laboratory evidence of dysfunction.
This tool is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider for diagnosis, treatment, or any health concerns.
FAQ
Is this thyroid symptom checker free?
Yes, completely free with no signup. All data stays in your browser.
What is the difference between hypothyroidism and hyperthyroidism?
Hypothyroidism means the thyroid gland is underactive — it produces too little thyroid hormone. Symptoms include fatigue, weight gain, cold sensitivity, and constipation. Hyperthyroidism means the thyroid is overactive — too much hormone. Symptoms include weight loss, anxiety, heat sensitivity, and rapid heartbeat.
Can this tool diagnose a thyroid condition?
No. Only a blood test measuring TSH (thyroid-stimulating hormone) and thyroid hormone levels (T3, T4) can diagnose thyroid dysfunction. This tool identifies which symptom pattern your experience most closely matches, but diagnosis requires laboratory testing and clinical evaluation.
What TSH levels are considered normal?
Standard laboratory reference ranges for TSH are approximately 0.4-4.0 mIU/L. TSH above 4.0 may indicate hypothyroidism (underactive thyroid). TSH below 0.4 may indicate hyperthyroidism (overactive thyroid). Ranges vary slightly by laboratory and may be adjusted for age, pregnancy, and other factors.
When should I see a doctor about thyroid symptoms?
See your healthcare provider if you have multiple symptoms matching either hypothyroid or hyperthyroid pattern, especially if they are new, persistent, or worsening. A simple TSH blood test is often the first step in evaluating thyroid function.