If your thyroid gland is malfunctioning, several symptoms can occur. The thyroid is integral in the function of the endocrine system, and hyperthyroidism occurs when the gland produces too much thyroid hormone, causing eye-bulging, thin skin, irritability, and nervousness. An underactive thyroid (hypothyroidism) can result in memory problems, constipation, depression, and fatigue. There are several medications like Synthroid and desiccated thyroid to assist in symptoms. Check out our articles about the thyroid to learn more about treatment options, medications, and their respective benefits and side effects.