Ketone body is generally referred to as urinary ketone body, elevated may be related to physiological causes such as hunger, strenuous exercise, etc., but also may be related to renal reabsorption dysfunction, digestive system diseases, diabetic ketoacidosis and other diseases. 1. Physiological reasons: when the body carbohydrate intake is insufficient, it can cause the body fat metabolism oxidation reaction increases, resulting in ketone body elevation, such as hunger, strenuous exercise. 2. Pathological causes: such as infectious diseases (pneumonia, typhoid fever, sepsis, tuberculosis, etc.), severe vomiting, diarrhea, prolonged starvation, general anesthesia, etc. can appear ketone body elevation. When the body ketone body is elevated, the cause should be clarified under the guidance of the doctor in order to actively treat.