Thyroid cancer may have no symptoms at first; the most common sign is a lump (nodule) in the neck, and difficulty breathing, difficulty or pain when swallowing and hoarseness are also symptoms [1]. Thyroid nodules are very common and most are harmless [2]. If you have a lump in your neck, see your doctor so that its type can be found with an ultrasound and, if needed, a fine needle biopsy.
Symptoms of thyroid cancer
| Symptom | Explanation | What to do |
|---|---|---|
| A lump (nodule) in the neck | The most common symptom; but most nodules are harmless [1, 2] | See your doctor for an examination and ultrasound |
| Hoarseness | One of the symptoms [1] | If it lasts more than a few weeks, see your doctor |
| Difficulty or pain when swallowing | One of the symptoms [1] | See your doctor to be checked |
| Difficulty breathing | One of the symptoms [1] | If it is getting worse, seek care straight away |
This table does not replace an examination by a doctor; in most people these symptoms have a benign cause.
The path to diagnosis
When should I call my doctor?
If you have a new or growing lump in your neck, hoarseness that has lasted several weeks, or difficulty swallowing, see your doctor. Most thyroid nodules are benign [2], but a firm diagnosis is only possible after a doctor's assessment.
Shortness of breath or severe difficulty swallowing needs urgent care.
Related questions
An ultrasound showed a thyroid nodule; does that mean I have cancer?
Most likely not; most thyroid nodules are harmless [2]. Based on the nodule's appearance on ultrasound, your doctor decides whether a biopsy is needed or follow-up is enough.
Should everyone have an ultrasound for thyroid cancer?
No. The US Preventive Services Task Force does not recommend ultrasound in people without symptoms [4], because it finds small cancers, many of which would never have caused harm.
Can thyroid cancer be cured?
Most thyroid cancers have a very good outcome: about 9 in 10 are of the "differentiated" type, and in the most common type almost all patients are alive after 10 years [3]. Read more: Thyroid cancer
Related cancer types
Related questions
References
6 referencesShow all references, 5 with a study cardClose the reference list
Numbers in the text, such as [1], refer to these sources. Sources with a “Study card” button are summarised in the site’s evidence library.
- 1
- 2
- 32025 American Thyroid Association Management Guidelines for Adult Patients with Differentiated Thyroid Cancer
- 4Screening for Thyroid Cancer: US Preventive Services Task Force Recommendation Statement
- 52015 American Thyroid Association Management Guidelines for Adult Patients with Thyroid Nodules and Differentiated Thyroid Cancer
- 6The 2023 Bethesda System for Reporting Thyroid Cytopathology
This page is based on reputable scientific sources and was last updated on 28 October 2026. The content of this website is for educational and informational purposes only and does not replace consultation, diagnosis or treatment by a specialist physician. Consult your treating physician about any treatment decision.
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