These are the most common symptoms of thyroid cancer:
A lump or swelling over your thyroid or elsewhere in your neck
A persistent cough, without symptoms of a cold
Hoarseness or other changes in your voice that are persistent
Neck pain, especially in the front of your neck that can radiate up to your ears
Swollen lymph nodes
Trouble breathing that feels like you are breathing through a straw
Less serious medical problems also can cause these symptoms. If you have any of these symptoms, you should contact your doctor promptly.