Ketone bodies are intermediate products of fat metabolism, normal human urine is not the presence of ketone bodies, laboratory urine shows ketone bodies three plus is certainly not normal performance. First of all, we have to consider is caused by diabetes; secondly, is the oral administration of certain drugs; again, a long time without food the human body is in a state of starvation, will be through the decomposition of fat to provide energy, this time there will be a large number of ketone bodies in the urine; lastly, if the drink is too little and the body is in a state of dehydration, will lead to ketone bodies in the urine, and in time to eat water, ketone bodies can automatically disappear. It is recommended to repeat the urine routine three times, if each urine routine shows that ketone bodies are present, we should go to a regular public hospital for further examination, blood test blood glucose value, to find out the cause of the cause of the treatment under the guidance of the doctor.