Shock caused by diabetes mellitus is mainly due to ketoacidosis or hyperosmolar hyperglycemia syndrome caused by poor glycemic control. Early signs are mainly manifested as aggravation of the symptoms of “three more and one less”, fatigue, loss of appetite, etc. In the later stage, symptoms of severe water loss will appear, which may be accompanied by different degrees of consciousness disorders and coma. 1. Diabetic ketoacidosis: early “three more and one less” (polyuria, polydipsia, polyphagia, weight loss) symptoms worsening, nausea and vomiting, loss of appetite, polydipsia, dry mouth, lethargy, deep and fast breathing, etc., and the smell of rotten apples in the exhaled breath. In later stages, severe water loss occurs, with decreased urine output, sunken soft tissues in the eyes, decreased blood pressure and even coma. A few patients develop abdominal pain, which may be a symptom of acute abdomen. 2. Hypertonic hyperglycemia syndrome: early onset of slow disease, initially polyuria, polydipsia, loss of appetite, and then may appear dehydration and neuropsychiatric symptoms, the patient is unresponsive, lethargy, indifference, and late urinary, may also be accompanied by varying degrees of impaired consciousness, coma and so on. Diabetic patients with symptoms of shock should consult a doctor in time, under the guidance of the doctor for treatment, daily attention to take medication on time, pay attention to the diet with. If there is any discomfort, consult the doctor in time.