Diabetic ketoacidosis (DKA) is a serious complication of diabetes characterized by high blood sugar, ketones in the blood and urine, and dangerously low pH levels. It occurs when there is not enough insulin to allow glucose to be used for energy, causing the liver to break down fat into ketones instead. Overproduction of ketones makes the blood acidic, and DKA mainly affects those with type 1 diabetes but can also impact some with type 2. DKA is treated with fluids, electrolytes, and insulin to rebalance sugar and ketone levels, but treatment can sometimes cause complications like low potassium, swelling of the brain, or organ damage from fluid loss if not carefully managed.