The possible reasons for too smelly urine are as follows: 1. With urinary tract infection, the urine mixed with pus or bacterial metabolites, shed epithelium, etc. after infection, will lead to smelly urine, accompanied by urinary tract irritation symptoms such as frequent urination, urgency, urination pain, and the discharged urine is muddy in appearance and dark in color. Routine urine examination and urine culture examination are required to exclude infection. 2. The urine of patients with diabetes is smelly, because the urine contains too much sugar or ketones, which may lead to smelly urine, and urine sugar and blood sugar detection is required. 3. If you eat a large amount of scallions, garlic, durian, etc. in your diet, it can cause the urine to smell temporarily. If you stop taking relevant food, the urine odor will disappear. 4. For patients with high protein diet or meat diet for a long time, the protein in the urine can be decomposed to produce ammonia, and the urine discharged has a bad smell.