Causes of foul-smelling urine in humans include urinary tract infections, dehydration and underlying medical conditions such as liver disease, explains Healthline. In certain cases, odorous urine occurs after eating certain foods such as asparagus and garlic. It is always important to seek medical attention if unusual symptoms of urine odor are accompanied by nausea or last longer than two days.
Additional causes of odorous urine include bladder infections and gastrointestinal-bladder fistula, a condition in which the bladder and intestines are connected in an abnormal fashion, according to Mayo Clinic. Metabolic disorders that interfere with the body converting ingested foods into energy can also cause foul-smelling urine.
Certain medications and beverages such as coffee are also known to cause odorous urine, explains the National Association for Continence. When foul-smelling urine is caused by incontinence, it can often be controlled with oral internal deodorant tablets. Proper bathroom habits such as wiping from front to back and changing undergarments on a daily basis can also help minimize offensive odors. Vitamin C tablets are also known to be helpful in keeping the urine odor-free; however, vitamin C can interact with certain medications and medical conditions, so it is always important to consult with a physician before starting any type of supplement regimen.