Endocrinology is the study of the endocrine system and its role in the body. It focuses on hormones, their functions, and the diseases and disorders that can result from hormonal imbalances. Endocrinologists specialize in the diagnosis and treatment of endocrine diseases, such as diabetes, thyroid disorders, and adrenal disorders. Endocrinology also includes the study of endocrine disruptors, which are chemicals that can interfere with the body's natural hormone production and cause health problems.