A doctor may recommend examination of the throat and vocal cords, sometimes using a small flexible camera called a laryngoscope.
2. Difficulty Swallowing or a Feeling That Food Gets Stuck
Difficulty swallowing is another possible symptom of thyroid cancer, particularly when a tumor becomes large enough to press against nearby structures.
The esophagus, which carries food from the mouth to the stomach, runs behind the thyroid gland.
A growing thyroid mass may place pressure on the esophagus or surrounding tissues. This can create a sensation that food is sticking in the throat or that swallowing requires extra effort.
People may describe:
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Difficulty swallowing solid food.
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A sensation of pressure when swallowing.
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Feeling that food moves slowly through the throat.
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Discomfort when swallowing.
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A persistent feeling of something being stuck in the neck.
This symptom is medically known as dysphagia.
However, swallowing difficulties have many possible causes, including reflux disease, esophageal disorders, neurological conditions, throat infections, and benign thyroid enlargement.
Important distinction: Difficulty swallowing does not automatically mean that a thyroid tumor is pressing on the esophagus. The cause needs to be investigated.
If swallowing becomes progressively more difficult, or if food frequently gets stuck, seek medical evaluation. Inability to swallow saliva, choking, or significant breathing difficulty requires urgent medical attention.
3. Neck Swelling or a Lump That Does Not Go Away
A lump in the front of the neck is one of the most recognized signs of thyroid cancer.
The thyroid gland normally sits just below the Adam's apple and extends across the front of the windpipe. When a nodule develops within the gland, it may become noticeable as a small swelling.
Some thyroid nodules are visible, while others can only be detected during a physical examination or ultrasound.
Features that deserve medical assessment include:
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A new lump in the lower front of the neck.
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A lump that gradually becomes larger.
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A firm or fixed-feeling swelling.
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A swelling that moves when swallowing.
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A lump accompanied by persistent hoarseness or difficulty swallowing.
Thyroid nodules are common, and most are benign. The presence of a nodule does not mean that someone has cancer.
Nevertheless, a newly discovered or enlarging neck lump should not be ignored.
A healthcare professional may recommend a thyroid ultrasound to examine the size, shape, composition, and other characteristics of the nodule.
4. Enlarged Lymph Nodes in the Neck
The lymphatic system helps the body fight infection and remove waste products.
Lymph nodes are small structures found throughout the body, including along both sides of the neck and above the collarbone.
Certain types of thyroid cancer, especially papillary thyroid cancer, can spread to nearby cervical lymph nodes.
This may cause one or more lymph nodes to become enlarged.
Possible signs include:
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A lump along the side of the neck.
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Swelling near the collarbone.
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A firm lymph node that remains enlarged.
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A lump that gradually increases in size.
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Neck swelling occurring alongside a thyroid nodule.
However, enlarged lymph nodes are much more frequently caused by infections and inflammatory conditions.
For example, a recent cold, throat infection, dental problem, or skin infection may cause temporary lymph node enlargement.
A lymph node that remains enlarged, grows, feels unusually firm, or appears without an obvious infection should be assessed by a healthcare professional.
Ultrasound can help distinguish normal or reactive lymph nodes from those with suspicious features.
5. Persistent Cough Without an Obvious Cause
A cough is not a typical or specific symptom of thyroid cancer, but it can occasionally occur.
A large thyroid mass may irritate or compress structures near the windpipe. In some cases, advanced disease involving nearby tissues may contribute to persistent coughing.
People may experience:
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A dry cough that does not improve.
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Frequent throat clearing.
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A sensation of irritation in the throat.
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Coughing that occurs without typical cold symptoms.
Nevertheless, persistent coughing is far more commonly associated with respiratory infections, asthma, allergies, smoking, postnasal drip, or acid reflux.
A cough alone is not a reliable indicator of thyroid cancer.
If a cough lasts several weeks, keeps returning, or occurs with hoarseness, swallowing difficulties, or a neck lump, it deserves medical evaluation.
6. Neck Pain or Discomfort
Many thyroid cancers do not cause pain, particularly in their early stages.
However, some people may experience discomfort in the front of the neck or around the thyroid gland.
Possible sensations include:
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A dull ache in the lower neck.
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Pressure around the thyroid area.
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Discomfort that extends toward the jaw or ear.
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Tenderness around a neck swelling.