What Causes Thyroid Nodules | UCLA Endocrine Center

Thyroid nodules are common and are usually detected by ultrasounds, says endocrine surgeon James Wu, MD. One of the main causes of thyroid nodules is increased age. The longer we live, the more likely some of our thyroid cells will develop abnormally into a clump of cells (nodule).

Anything that interferes with thyroid function can also cause thyroid nodules. For example, since the thyroid uses iodine to create the thyroid hormone, being iodine deficient can lead to the formation of nodules.

Studies have linked other factors to thyroid nodules including smoking, obesity and drinking alcohol.

Most thyroid nodules aren’t an issue, but it’s important to make sure a thyroid nodule isn’t interfering with your thyroid function. You should also have the nodule checked for any features suspicious for thyroid cancer.

To learn more, explore the UCLA Health Endocrine Center: https://www.uclahealth.org/medical-services/surgery/endocrine-surgery