Please Join us for this FREE HealthSpeak Educational Series. This topic will be about Hypothyroidism. The thyroid is a small gland in the neck that controls the body's metabolism. Hypothyroidism, or underactive thyroid, can cause a range of symptoms. If you are experiencing weight gain, cold intolerance and fatigue, you may be showing signs of hypothyroidism. Join Dr. Sam DeLiberato for a community discussion about hypothyroidism - and what to do about it.