Acute complications of diabetes Diabetic ketoacidosis: The early manifestations are aggravation of the general symptoms of diabetes, followed by loss of appetite, nausea, vomiting, abdominal pain, deep breathing and rotten apple odor in the exhaled breath, and in severe cases, significant water loss, decreased urine output, decreased blood pressure, and confusion to coma. The general examination of blood glucose is significantly elevated mostly in the range of 16.7-33.3 mmol/L, and the quantitative blood ketone body examination is mostly above 4.8 mmol/L.