Ketoacidosis is a metabolic state characterised by the accumulation of ketone bodies in the blood, leading to a decrease in blood pH and resulting in acidosis. It is clinically significant as it can cause severe complications, particularly in patients with uncontrolled diabetes, where it presents as diabetic ketoacidosis (DKA), potentially leading to coma or death if untreated. Early recognition and management are crucial to prevent life-threatening outcomes.