Several distinct problems can arise when your thyroid produces too much hormone (hyperthyroidism) or not enough (hypothyroidism). When your thyroid is underproducing or overproducing, it can cause irritating symptoms such as irritability, fatigue, weight loss, weight gain, and more. Four common issues associated with the thyroid contain Hashimoto’s thyroiditis, Graves’ disease, goiter (enlarged thyroid), and thyroid nodules. Keep study to learn about common thyroid disorders and diseases as well as their symptoms and treatment.