While the causes of thyroid cancer are unknown, some risks include:
- Getting too much radiation around the neck area, especially when you are young.
- Inheriting certain genetic conditions from parents.
A lump or swelling on the side of the neck is the most common symptom. Immediately talk with your health care provider if you have any of the following symptoms. Don’t wait until they get worse.
- Difficulty breathing.
- Difficulty swallowing.
- Having a hoarse voice.