Causes of strongly odored urine include dehydration, urinary tract infections, diabetes and eating certain foods, such as asparagus, states Healthline. In rare cases, liver disease, bladder fistula and a condition such as phenylketonuria can cause this condition.
Urine odor depends on the volume and concentration of substances kidneys extract, reports Mayo Clinic. Urine containing a lot of water may have no smell, but concentrated urine usually has a strong ammonia smell.
Bacterial infections in the urinary tract can cause a burning sensation when urinating, a strong urge to urinate and a strong urine smell, explains Healthline. Foods such as asparagus can change urine odor, due to the breakdown of methyl mercaptan, which is a sulfur compound also found in skunk secretions and garlic, notes WebMD. High blood sugar levels can cause sweet-smelling urine, which is a common symptom for people with untreated diabetes, says Healthline.
A strong urine odor may be a symptom of liver disease, together with abdominal pain, vomiting and bloating, states Healthline. Surgical injuries or diseases such as ulcerative colitis and inflammatory bowel disease can allow bacteria from the digestive tract to enter the bladder, causing urine odor. The inability of the body to break down the amino acid phenylalanine, a genetic condition called phenylketonuria, can cause mental defects, decreased skin pigmentation and an abnormal urine odor.