“Thyroid nodules are quite common. When examined with ultrasound imaging, as many as one-third of women and one-fifth of men have small thyroid nodules.

Most thyroid nodules are too small to see or feel. They tend to be found when you have an imaging test done for some other reason.

A large nodule or goiter may cause a sense of tightness or pain in your neck, and can sometimes grow large enough to interfere with breathing or swallowing.

If your thyroid function is affected, you might notice other symptoms. If your gland is producing too much thyroid hormone it will exhibit signs or symptoms of hyperthyroidism.  If your gland is producing not enough thyroid hormone it will produce signs and symptoms of hypothyroidism.

A goiter is an enlargement of the thyroid, the H-shaped gland that wraps around the front of your windpipe, just below your Adam’s apple.

A goiter can be smooth and uniformly enlarged, called diffuse goiter, or it can be caused by one or more nodules within the gland, called nodular goiter. Nodules may be solid, filled with fluid, or partly fluid and partly solid.”

University of California San Francisco Health – USCF Health (Thyroid Nodules and Goiter | Conditions | UCSF Health)