Causes and risk factors for thyroid cancer
The exact reason nodules grow in the thyroid gland is not known, however certain factors increase a person’s risk, and these include:
Family History. If a parent or sibling had a thyroid nodule, the chance of developing a nodule is increased
Age. The risk of developing a nodule increases as you age.
Gender. Women develop nodules more often than men
Thyroiditis. Nodules are more likely to form in people who have chronic inflammation of the thyroid gland.
Radiation exposure to the head or neck.