Urine odor can be classified as ammonia odor, sweet fruit odor, caramel odor, garlic odor, fecal odor, etc. It can be related to chronic cystitis, diabetic ketoacidosis and other diseases. 1. Ammonia odor: when fresh urine emits ammonia odor, it is considered that there may be chronic cystitis, chronic urinary retention and other diseases. 2. sweet fruit flavor: in the clinic is mostly seen in diabetic ketoacidosis, mainly because the patient’s body has too much sugar, so the urine contains a lot of glucose, when discharged with a special smell. Diabetic ketoacidosis is one of the serious acute complications of diabetes mellitus, the patient will also appear to drink more, eat more, exhale rotten apple flavor and other symptoms. 3. Caramel flavor: If the urine has a caramel flavor, you need to suspect that it may be caused by maple diabetes, which is relatively rare in clinical practice and is a genetic disease. The main reason is that the patient’s body can not metabolize protein normally. 4. garlic odor: mostly considered to be acute organophosphorus pesticide poisoning, belongs to a common critical illness, mainly with the organophosphorus into the human body and acetylcholinesterase combination. 5. Fecal odor: can be seen in vesicorectal fistula, refers to the rectum and the bladder between the fistula is connected, because the stool can be discharged through the bladder, the urethra, so there will be urine with fecal odor. Under normal circumstances, the urine of healthy people has a faint ammonia odor, with no obvious odor or pungency. Therefore, when the urine smells abnormal, you need to go to the hospital in time and cooperate with the doctor for active treatment.