There is diabetic ketoacidosis when the exhaled gas will appear the smell of rotten apples, mainly because of diabetes in a variety of causative factors, there is insulin secretion is obviously insufficient or glucagon inappropriately high, resulting in high blood glucose, high blood ketones will also cause dehydration, electrolyte disorders, will cause metabolic acidosis. In addition to exhaling the smell of rotten apples, it is also prone to cause gastrointestinal symptoms, breathing and consciousness will also change, easy to cause nausea, vomiting, dizziness, headache. Severe will also cause coma, lethargy, need to go to the hospital for blood gas analysis of blood glucose, but also need to improve other tests, general supplementation of insulin to promote the use of glucose, but also need to correct electrolyte disorders, dehydration.