Diabetes Insipidus is a condition characterised by the inability of the kidneys to concentrate urine, leading to excessive thirst and the excretion of large volumes of dilute urine, primarily due to a deficiency of antidiuretic hormone (ADH) or resistance to its effects. It is clinically significant as it can lead to dehydration and electrolyte imbalances, impacting overall health. A key association is central diabetes insipidus, which can occur after head trauma or pituitary surgery.