Urine consists mainly of water. It's the amount and concentration of various waste products excreted by the kidneys that cause urine odor.
Urine that contains a lot of water and few waste products has little to no odor. If urine becomes highly concentrated — a high level of waste products with little water — your urine may have a strong ammonia odor.
Some foods and medications, such as asparagus or certain vitamins, can cause a noticeable urine odor, even in low concentrations. Sometimes, unusual urine odor indicates a medical condition or disease, such as:
- Cystitis (bladder inflammation)
- Diabetic ketoacidosis
- Gastrointestinal-bladder fistula (abnormal connection between the intestines and bladder)
- Maple syrup urine disease (rare genetic condition that becomes apparent during infancy)
- Metabolic disorder (a problem with the way your body converts the foods you eat into energy)
- Type 2 diabetes (uncontrolled)
- Urinary tract infection (UTI)
So there are just too many causes for a strong urine odor. If it bothers you, you need to see a nephrologist and get tested to find out the underlying cause and treat it accordingly.