Urine ketone body three plus sign, the possible causes are as follows: 1, hunger or long-term malnutrition, long fasting, can cause the body to produce more ketone bodies through the urine out of the body, such as long-term hunger, fasting patients, then give food or supplemental sugar, supplemental nutrition ketone body can disappear. 2, diabetic patients with ketosis or ketoacidosis, etc., the urine can contain a large number of ketone bodies, due to diabetics Blood sugar is too high, the body sugar anaerobic metabolism produces more ketone bodies, which will cause the patient to produce ketosis, and combined with acidosis, serious patients can appear coma, oral respiration contains a large taste of rotten apples, the need for emergency glucose insulin infusion, the first to drop the blood glucose, and then continue to drip insulin to eliminate ketone bodies in the body, the case belongs to the more critical situation, clinically referred to as ketoacidosis, which requires immediate rescue treatment. This is a more critical situation, clinically known as ketoacidosis, and requires immediate rescue treatment.