Three plus signs of ketone bodies in routine urinalysis indicate enhanced lipolysis in the body. Ketone body is the fat metabolism after the production of acetoacetic acid, β hydroxybutyric acid and acetone, urine ketone body positive results are commonly found in the following two cases: 1. starvation, such as a day did not enter the diet and so on, to do the urine routine examination of the ketone body can be positive, there is no clinical significance. 2. diabetic timing in the body of the loss of a large number of glucose, so that the body fat decomposition increased to provide energy, diabetic ketoacidosis can happen! Acidosis, the urine ketone body is positive.