Endocrine disorders occur when the body's endocrine system, which produces hormones, does not function properly. This can lead to either an excess or deficiency of hormones, affecting various bodily functions such as metabolism, growth, and mood. Common endocrine disorders include diabetes, hypothyroidism, and Cushing's syndrome. These disorders can result from various factors, including genetic predisposition, autoimmune diseases, or tumors. Symptoms may vary widely depending on the specific disorder but can include fatigue, weight changes, and mood swings. Diagnosis often involves blood tests to measure hormone levels and other diagnostic procedures.