Pain can occur for many reasons, including thyroid inflammation, infection, muscle strain, and benign thyroid conditions.
In rare circumstances, thyroid cancer may cause pain when a tumor affects nearby tissues.
Sudden, severe neck pain should not automatically be attributed to cancer. It may require prompt evaluation for other causes.
Persistent or unexplained discomfort, particularly when accompanied by a growing lump or voice changes, should be discussed with a healthcare professional.
7. Unexplained Fatigue and Changes in Body Weight
Fatigue and weight changes are sometimes mentioned in discussions about thyroid cancer. However, they are not reliable early warning signs of the disease.
The thyroid gland produces hormones that regulate metabolism, energy use, temperature regulation, and many other bodily functions.
Certain thyroid conditions can change hormone production.
For example:
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Hypothyroidism may cause tiredness, feeling cold, constipation, and weight gain.
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Hyperthyroidism may cause palpitations, heat intolerance, tremors, and unintended weight loss.
However, most thyroid cancers do not significantly affect thyroid hormone production. Many people with thyroid cancer have normal thyroid function tests.
This means that a person can have thyroid cancer while their thyroid hormone levels remain normal.
Fatigue and unexplained weight changes may instead be related to anemia, sleep disorders, stress, diabetes, medication effects, digestive conditions, or other illnesses.
If these symptoms persist, a medical assessment can help identify the underlying cause.
8. A Sensation of Pressure or Tightness in the Throat
Some people with an enlarged thyroid or thyroid nodule describe a feeling of tightness in the front of the neck.
They may feel as though a collar is too tight or that something is pressing against the throat.
This sensation is sometimes called a globus sensation, although globus can occur without any physical mass.
Possible causes include:
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Thyroid enlargement.
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Benign thyroid nodules.
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Acid reflux.
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Throat muscle tension.
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Anxiety-related muscle tension.
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Inflammation around the throat.
A thyroid tumor can sometimes produce pressure symptoms when it becomes large or affects nearby structures.
However, a sensation of tightness alone cannot establish a diagnosis.
If the sensation is persistent, particularly if it is associated with a visible swelling or difficulty swallowing, a doctor may recommend examination and ultrasound.
9. Breathing Difficulties or Noisy Breathing
Breathing problems are uncommon as an early symptom of thyroid cancer, but they can occur when a large thyroid mass compresses the trachea, the airway that carries air into the lungs.
People may notice:
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A feeling that the throat is becoming narrower.
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Difficulty breathing when lying down.
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Noisy breathing.
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Shortness of breath that gradually worsens.
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A sensation of pressure around the windpipe.
In advanced cases, a tumor may invade or compress nearby structures.
Breathing difficulty can also result from asthma, heart disease, respiratory infections, allergic reactions, and other serious conditions.
Do not wait for a routine appointment if breathing becomes difficult. Severe or rapidly worsening shortness of breath, noisy breathing at rest, or an inability to speak normally requires emergency medical attention.
10. Symptoms Associated With Advanced Disease
Most thyroid cancers are diagnosed before they spread to distant organs. However, some cancers can spread beyond the thyroid and nearby lymph nodes.
The symptoms depend on where the cancer spreads.
For example:
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Lungs: Persistent cough, shortness of breath, or coughing up blood.
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Bones: Persistent localized bone pain or fractures.
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Other areas: Symptoms depend on the affected organ.
These symptoms are not specific to thyroid cancer and can have many other explanations.
If a person has already been diagnosed with thyroid cancer, new or worsening symptoms should be discussed with their treating team.
What Are the Main Types of Thyroid Cancer?
Thyroid cancer is not a single disease. Different types develop from different cells in the thyroid gland and can behave differently.
Understanding the main types helps explain why diagnosis and treatment vary.
Papillary thyroid cancer
Papillary thyroid cancer is the most common type.
It often grows slowly and may spread to lymph nodes in the neck. Many patients have favorable outcomes, especially when the disease is diagnosed at an early stage.
Follicular thyroid cancer
Follicular thyroid cancer is less common than papillary thyroid cancer.
It can spread through the bloodstream, including to the lungs and bones.
Treatment and prognosis depend on the extent of disease and other clinical characteristics.
Medullary thyroid cancer
Medullary thyroid cancer develops from parafollicular C cells, which produce calcitonin.
Some cases are inherited and associated with genetic conditions, including multiple endocrine neoplasia type 2.
People with a family history of medullary thyroid cancer may benefit from genetic counseling and appropriate testing.
Anaplastic thyroid cancer
Anaplastic thyroid cancer is rare but aggressive.
It may grow rapidly and cause noticeable neck swelling, swallowing difficulties, hoarseness, or breathing problems.