Could it indicate any other medical condition?

The following conditions can sometimes cause smelly urine, but they are uncommon:

• urinary stones these may cause an ammonia-like odour (read about bladder stones and kidney stones )
• a bladder fistula this is an abnormal connection between your intestines and bladder
• maple syrup urine disease this rare genetic disease means you have difficulty breaking down certain amino acids
• liver failure (read about the different types of liver disease that can lead to liver failure)
• diabetic ketoacidosis this dangerous complication of diabetes happens when the body is unable to use blood glucose because there isn't enough insulin, so it breaks down fat as an alternative source of fuel, causing a build-up of a by-product called ketones