In the United States, the most common cause of goiter is Hashimoto’s thyroiditis, says Dr. Barlow. This is an autoimmune disorder that causes hypothyroidism, or an underactive thyroid. The body’s ...

If you’ve ever spotted a soft, squishy lump under the throat of a baby goat, you may have been alarmed — especially if you’ve heard the word “goiter” thrown around in goat circles. But in most cases, ...