For many patients, especially in the early stages of thyroid cancer, experience no noticable symptoms. As the cancer begins to develop patients may notice a lump or nodule at the front of their neck, a hoarseness or difficulty speaking, swollen lymph nodes, difficulty swallowing or breathing through the throat, and a throat or neck pain.
If you begin to experience these symptoms especially when in combination with each other seek attention from your primary care physician. The doctor can take a look at your symptoms and see if perhaps another disease is causing problems.
You'll want to know which of the four types of thyroid cancer you have (or whether the problem is something else):EndocrineWeb.com: Thyroid Cancer - Diagnosis, Treatment and Prognosis
can help you make a decision about your thyroid cancer.