Pee smells when you don't flush because waste products, like ammonia, become concentrated and bacteria grow on them, releasing pungent odors as they break down, especially if the urine sits in the toilet bowl or on surfaces; dehydration makes this worse by creating more concentrated urine, but bacteria in the toilet itself, or even certain foods/medications, can also cause strong smells.
If urine has a lot of waste with little water, also called concentrated, it might have a strong odor from a gas called ammonia.
One of the more common causes of smelly, darker yellow urine is dehydration. When you don't drink enough water, the amount of waste products in your pee increases. High levels of urea can make your urine smell like ammonia.
Kidney failure can make urine smell strongly of ammonia or have a fishy odor, often due to built-up waste products (amines) or infection, signaling concentrated urine from dehydration or kidney dysfunction. Other signs alongside bad-smelling urine include foamy, bloody, or cola-colored urine, swelling, fatigue, and changes in urination, all pointing to potential kidney issues that require a doctor's evaluation.
Urine typically smells mild, but many factors — from dehydration and drinking too much coffee to health issues and medications — can affect the way your urine smells. In many cases, strong-smelling urine isn't an issue and the odor returns to normal quickly.
Patients affected by trimethylaminuria will often have fishy-smelling urine. Trimethylaminuria is a genetic disorder in which affected individuals have an enzymatic deficiency that makes them unable to metabolize TMA. Because they cannot metabolize TMA, affected individuals have a buildup of TMA in their bodies.
One sign that you possibly have diabetes or high blood sugar is urine that smells sweet or fruity. The sweetness comes from sugar in your urine and is a sign your body is trying to get rid of extra sugar in your blood.
If your kidneys aren't working properly, you may notice one or more of the following signs:
Stay Hydrated
Water helps flush out toxins and waste products from your body, allowing your kidneys to function more efficiently. Aim to drink at least 8-10 glasses of water daily, and consider increasing your intake if you're active or live in a hot climate.
The combination of the three is often powerful enough to drive away strong urine smells. The solutions is eight fluid ounces of peroxide, three tablespoons of baking soda, and a few drops of dish detergent. It is best to test a small area first to ensure it does not discolor flooring, carpet or any other surfaces.
You should worry about urine smell and see a doctor if it's persistent, accompanied by fever, pain/burning during urination, cloudy or bloody urine, or if it smells sweet (potential diabetes) or rotten (potential infection/kidney stones). While often temporary due to dehydration or food, persistent strong or unusual odors, especially with other symptoms, warrant medical attention to rule out UTIs, diabetes, or other conditions.
Water can help with hydration and eliminate the smell. Protect your vagina (and vaginal flora) during sex. Wear condoms to reduce your risk of sexually transmitted infections (STIs) and other infections, like BV, that can disrupt your vagina's pH levels.
Liver disease can make urine smell musty, sweet, or like ammonia due to the buildup of toxins (like dimethyl disulfide/methyl mercaptan) that the failing liver can't process, leading to a specific scent known as foetor hepaticus, often accompanied by dark urine and jaundice. This ammonia-like odor comes from excess urea breakdown, while a sweet smell can also signal uncontrolled diabetes, so a medical evaluation is crucial.
Food Rich in Sulfur
If your farts constantly smell bad, you should look closely at what you are eating. Some vegetables are higher in sulfur and are usually considered the culprit behind the foul-smelling flatulence. Here is a list of some foods that are high in sulfur and lead to bad smelling gases: Cauliflower.
Foul-smelling urine may be due to bacteria. Sweet-smelling urine may be a sign of uncontrolled diabetes or a rare disease of metabolism. Liver disease and certain metabolic disorders may cause musty-smelling urine.
Trimethylaminuria (trī-meth'il-am-i-nyūr'ē-ă) is a metabolic disorder that makes your sweat, breath, saliva and pee smell like rotten fish. Metabolic disorders affect how your body processes nutrients and enzymes. Healthcare providers may refer to this condition as TMAU or fish odor syndrome.
Diabetes and high blood pressure are the top culprits damaging kidneys most, as they harm the delicate filtering blood vessels, leading to chronic kidney disease (CKD) and failure; other major factors include smoking, obesity, dehydration, poor diet (high sugar/salt/red meat), certain medications (NSAIDs), lack of sleep, and genetic conditions. These factors create a cycle where damaged kidneys worsen blood pressure, further damaging them.
Water is the best beverage for supporting kidney health. It helps flush out toxins, maintains electrolyte balance, and prevents dehydration. Drinking at least 8–10 glasses of water daily is essential for anyone in recovery, especially those enrolled in an Alcohol Treatment Program or Drug Rehab Programs.
Many people wonder how long it takes to pee after drinking water, but it depends on a variety of factors. Generally, it takes your body 9 to 10 hours to produce 2 cups of urine. A properly hydrated person with an almost full bladder will need to urinate between five to fifteen minutes after drinking water.
Generally, earlier stages are known as 1 to 3. And as kidney disease progresses, you may notice the following symptoms. Nausea and vomiting, muscle cramps, loss of appetite, swelling via feet and ankles, dry, itchy skin, shortness of breath, trouble sleeping, urinating either too much or too little.
You can check kidney function at home using at-home test kits for urine (detecting protein/albumin) or finger-prick blood tests (checking creatinine/eGFR), often with smartphone apps for analysis, or by monitoring symptoms like increased nighttime urination (nocturia), swelling, or changes in urine (blood, foam) and discussing results with a doctor, as home tests screen but don't replace professional diagnosis.
Kidney stones form in the kidneys. Symptoms may start as stones move into the ureters. The ureters are thin tubes that let urine pass from the kidneys to the bladder. Symptoms of kidney stones can include serious pain, upset stomach, vomiting, fever, chills and blood in the urine.
Common causes of smelly pee
Things that can often make your pee smell stronger include: certain types of food and drink, like asparagus or coffee. not drinking enough fluids (dehydration) some medicines.
It's normal to have a small amount of sugar in your pee. But if urine (pee) test results show more than 0.25 mg/ml of glucose, that's glycosuria. Sometimes, glycosuria is a symptom of hyperglycemia (high blood sugar). But it can also happen in people with normal or low blood sugar levels.
If your cells can't get enough glucose, your body breaks down fat for energy instead. This produces an acid called ketones, which can build up in your blood and urine. Having some ketones in your urine is normal. But high ketone levels in your urine may be a sign that your blood is too acidic.