If the urine ketone body is positive, the first thing to do is to rule out the combination of acute complications of diabetes mellitus, which is often referred to as diabetic ketoacidosis. If diabetic ketoacidosis does exist, what we need to do is to monitor the fingertip blood glucose more than 13.9, whether there is a strong positive urine ketone body, blood gas analysis to see whether the blood pH is less than 7.35, according to the results, if there is indeed diabetic ketoacidosis, we need to do intravenous insulin to lower glucose and rehydration to eliminate ketones and other symptomatic treatment. If it is not diabetic ketoacidosis, it is necessary to exclude whether the urine ketone body is positive due to other diseases. Because ketone bodies are intermediate products of fat metabolism in the body, under normal circumstances the qualitative test for urine ketone bodies is negative, but under the influence of long-term feeding, starvation infection and other factors, urine ketone bodies may be positive, so if urine ketone bodies are found to be positive, it is recommended to go to the hospital in a timely manner to clarify the specific cause and treat according to the cause.