Symptoms of Thyroid Disease The symptoms of thyroid disease are going to vary from one person to the next. The symptoms depend on the type of thyroid problem. Thyroid hormone imbalance may be due to hypothyroidism - an underactive thyroid, or hyperthyroidism - an overactive thyroid. For both conditions, the symptoms may develop over a variable time frame. Many of the symptoms … [Read more...] about What Are the Symptoms of Thyroid Diseases?