Do you feel sluggish or depressed? Do you tire easily? Are you overly sensitive to the cold? Do you feel swollen or overweight?An overactive or underactive thyroid could be the hidden cause behind many of these common symptoms. Left untreated, a malfunctioning thyroid may lead to serious complications. Once diagnosed, however, it can usually be treated safely, easily, and without anxiety.Completely revised and updated for the nineties, Your A Home Reference explains what the latest scientific advances can mean to you. It is the essential guide to some of America's most common health problems, and an essential addition to every home medical library.