Frequent hoarseness is a sign of parathyroid dysfunction. The parathyroid gland are a pair of small glands, located in the throat near the thyroid. The parathyroid produces a hormone called parathyroid hormone of PTH. PTH causes an increase in the resorption of calcium from the bone and the intestines. Therefor, PTH is one of the major factors in regulation of calcium concentration in extra-cellular fluid.
A decrease in the level of ionized calcium is the primary stimulus for PTH secretion, while an increase is serum calcium inhibits PTH secretion. Parathyroid dysfunction may be a serious metabolic problem that should be evaluated by a doctor qualified to diagnose and treat parathyroid dysfunction.
Reference: Weatherby, D. (2004). Signs and Symptoms Analysis from a Functional Perspective. Jacksonville, OR: Bear Mountain Publishing.