Diabetic ketoacidosis is an acute complication of diabetes mellitus. Diabetic ketoacidosis, if left untreated, can lead to dehydration, multi-organ failure, seizures, and even sudden death. 1. Dehydration: when diabetic ketoacidosis is detected, the patient is in a state of dehydration, which can lead to circulatory failure if not treated in time with rehydration therapy. 2. Multi-organ failure: diabetic ketoacidosis is not treated in time, may lead to multi-organ failure, including kidney failure, heart failure. 3. Epilepsy: Diabetic ketoacidosis may also cause neuronal discharges in the brain, resulting in recurrent seizures. 4. Sudden death: Diabetic ketoacidosis may also lead to sudden death. Diabetic ketoacidosis is a serious disease that should be treated promptly to avoid delays in treatment.