If ketone bodies (+), the most common cause is starvation. If a diabetic patient stops taking insulin without permission during treatment, it can lead to high blood sugar, or it can cause metabolic disorders in the body, reduced protein synthesis, and accelerated breakdown of fat under triggers such as infection. Ketone bodies are metabolic products of fat decomposition, which do not exist in the urine of normal people. Ketone bodies are an acidic and harmful substance, and their accumulation in the body can cause ketoacidosis and, in severe cases, coma. At present, the ketone body is only (+), you can drink more water to promote the excretion of ketone body, and check whether the value of intravenous blood sugar is high. If you have recently had a poor diet, resume a normal diet, avoid starvation, and recheck your urine routine at a later date after correction. If ketone bodies persist and worsen, hospitalization is required for rehydration and ketone elimination therapy.