If there is a sweet smell in the urine, the possible causes: 1, diabetic patients, the urine contains more glucose, the sugar content increases, there will be urine emitting sweet smell, you need to carry out the patient’s urine glucose measurement and blood glucose measurement, to further clarify whether they have diabetes. 2, suffering from diabetic ketoacidosis, the urine contains a large number of ketone bodies, the urine emits a sweet smell, at the same time can be accompanied by respiratory exhalation rotten Apple smell, or the smell of rotten apples in the urine, etc., the need for routine urine testing. If more ketone bodies are present in the urine, it can be diagnosed as diabetic acidosis and further treatment is needed.3. Patients who have been starving for a long time can also have elevated levels of ketone bodies in the urine and may have sweet-smelling urine. Routine urine testing is required, and the urine contains high levels of ketone bodies. With a history of prolonged starvation, treatment such as glucose supplementation or immediate feeding to eliminate ketone bodies needs to be given.