Thyroid cancer is far less common than other thyroid issues like hypo and hyperthyroidism. But thyroid issues are normally accompanied by tremors, bulging eyes, excessive weight loss or weight gain, irregular bowel movements and irregular periods for females. It can also cause changes in the hair, skin, and nails. You may also be hot or cold all the time. An enlarged neck is another symptom. Keep in mind all the symptoms I just listed are for thyroid disorders, not cancer. I have hyperthyroidism and my specialist says thyroid cancer isn't common and even when people get it, it's highly treatable. You can make an appointment with an endocrinologist and they can check you out.