urine bad smell

urine bad smell


If bad urine smell has caused you concern If you are worried that bad smell of urine may be a warning of a serious and dangerous underlying cause, we recommend that you read on. 


What you will read next:



What is the definition of bad-smelling urine?

Why does urine smell bad?

In what cases should we see an emergency doctor?





Urine can have certain characteristics in appearance. Bad odor, Spicy odor, sweet odor may be present in a person's urine. The most common causes that change the smell of urine and cause bad odor are dehydration and eating diets with foods such as garlic and spices and asparagus or side effects followed by taking vitamins and supplements and medications.


What is the definition of bad-smelling urine?

Doctors say that natural urine has a specific odor, and under normal circumstances the smell of urine is mild and sometimes incomprehensible, but certain conditions may occur that make the urine smell pungent and unpleasant.

Stinky urine can be a cause for concern, we must say that the strong and bad smell of urine that irritates you and despite drinking a lot of water does not go away, especially if accompanied by urinary symptoms such as:

Pelvic abdominal pain, back pain, chills, nausea, vomiting, and changes in the appearance and color of urine must be evaluated by a medical team.


Why does urine smell bad?

The question arises as to what causes bad-smelling urine, and in this section, we want to talk more about these causes.

Urine takes its main volume from water.

The amount and concentration of various wastes that are filtered and excreted by your kidneys are actually the things that cause the smell of urine.

The lower the ratio of urinary water and the higher the concentration of waste products, the sharper and more intense the smell of urine.

When your body is not dehydrated, the kidneys work well and urine is produced that contains a lot of water and low waste products. The concentration of waste products in the urine is low, so the smell of urine is very mild and you often do not smell it at all.

If for any reason the urine becomes very thick, such as the concentration of waste products, for example, due to liver failure or due to dehydration, the amount of urinary water decreases and a strong odor of ammonia will be inhaled in the urine.

It is also said that some foods, such as asparagus, garlic, onions and spices, can cause a significant change in the odor in a person's urine.

The most common causes of bad-smelling urine are:

  1. Dehydration
  2. Excessive coffee consumption
  3. Consume foods such as: asparagus, garlic, onions
  4. Diabetes
  5. Infection of urinary tract infections, Bladder infections, Kidney stones and Genital fungal infections
  6. Medications and supplements
  7. Pregnancy
  8. Weak immune system


  1. Dehydration

The most common cause of strong, pungent odor is dehydration. If you get a little water in your body, the concentration of toxins as well as chemicals in the urine will be very high and the urine will smell of strong ammonia. Urine excreted by the dehydrated body is dark, thick and small, has an unpleasant odor, and this condition is well relieved by drinking large amounts of water.


  1. coffee consumption in large quantities

It is not yet clear why the smell of some people's urine changes after drinking large amounts of coffee.

But it is said that chemicals from the decomposition of coffee may enter the urine and change the smell of the urine.


  1. Special diet

If you eat foods during the day that contain onions, garlic, curry, alcohol, cabbage, salmon, and asparagus, you may feel that your urine smells of sulfur and smells bad.

Doctors believe that when a person consumes asparagus, the body must have an enzyme to break down the molecules in this vegetable and turn it into substances that do not cause urine to smell when excreted, and interestingly, 40% of people worldwide don’t have this enzyme, so in the urine and feces of these people, a substance containing methyl is excreted, which causes a clear odor change in the urine and feces of these people.

Another issue is in the diet, people that have a diet high in sodium salts, usually excrete more concentrated urine, and due to the high concentration of their urine, the smell of urine is sharper.

If you are one of those people that the smell of your urine changes after eating these substances and you notice an unpleasant odor, we recommend that you drink plenty of water and the best way to get rid of this unpleasant odor is to avoid eating the mentioned foods and Know that by stopping eating these foods, the smell of urine will return to normal after one to two days.


  1. Uncontrolled diabetes

You may have heard that many years before the experiments came to fruition, urologists tasted the urine of people suspected of having diabetes. The taste of their urine was sweet and the reason for naming this disease as diabetes mellitus was the sweet taste of their urine.

And it is interesting to know that the word diabetes in Latin means Polyuria, and when we say diabetes mellitus, we mean a person who suffers from urinary incontinence and his urine tastes sweet.

People who eat large amounts of sugar and sweets but do not have diabetes mellitus do not have a bad urine odor.


  1. Infections

Urinary tract infections are one of the most common causes of bad smell of urine. when there is an unpleasant odor, bladder infection, urinary tract infection and kidney infection can be associated with foul-smelling urine. Another cause of foul-smelling urine is kidney stones. Kidney stones are hard masses that are formed due to the concentration of urine and the deposition of some chemicals in the kidneys. If the stones are large and cause obstruction, an infection will occur and cause a bad smell of urine.

Abdominal pain, Pelvic pain, Nausea, Vomiting, Anorexia, Low back pain, Foamy urine, Discoloration of urine, presence of blood in urine, and brown urine can be a warning sign of kidney and urinary tract infection.

Other causes of infection include fungal infections in women, which can be accompanied by a bad odor in the genital area and a bad odor in the urine.


  1. Pregnancy

One of the conditions that women experience due to changes in sex hormones, especially in the first trimester of pregnancy, is a slight change in the smell of urine, which is considered normal and not very severe and annoying, and with it, there are no symptoms of urinary tract infections.

A similar experience may also occur in some women during the menstrual cycle due to fluctuations in the hormones estrogen and progesterone.


  1. Taking medications and some supplements

Doctors say that there are two groups of drugs that can cause bad smell of urine. The smell created by these two drugs is like a rotten egg and sulfur.

The first group of medicinal supplements that contain B vitamins.

Doctors say that instead of taking supplements containing oral vitamin B12, you can use intramuscular injection of vitamin B12 and eliminate the bad smell of urine.

The second category is drugs that doctors call sulfa drugs, such as drugs used to treat rheumatoid arthritis or certain types of antibiotics as well as oral contraceptives.


  1. Weak immune system

Another thing that causes bad smell of urine is that people with weakened immune systems may also have unpleasant-smelling urine.

Classification of unpleasant urine odor in terms of severity:

    • Do not worry if your urine odor is mild. Usually, these changes in urine odor are due to the consumption of some foods and dehydration and the start of taking new supplement. In these cases, especially if we do not have other symptoms, there is no need to worry. And within the next day or two, the odor of urine will disappear by eliminating the cause.
    • If the intensity and unpleasant odor of urine is moderate, if there are other symptoms, for example, if the appearance of urine has changed and foamed or there is frequent urination and this unpleasant odor is not eliminated by stopping food, this issue must be taken seriously and it should examined.
    • If you’re the unpleasant odor of urine is severe, especially if it persists, and there are symptoms such as fever and chills, nausea, vomiting, anorexia, abdominal pain, pelvic pain, back pain, frequent urination, and discoloration of the urine, you should tell your doctor immediately.


In what cases should we see an emergency doctor?

There are some of the following symptoms that you may have and the persistent bad smell of urine should be seen by a doctor immediately. These emergency warning signs include:

    • Severe fatigue
    • Persistent thirst
    • Sweet smell of urine
    • Frequent urination
    • backache
    • Ague
    • Pink and red color of urine
    • Foamy urine
    • Persistent fatigue
    • Swelling of the ankles
    • Sour smell of urine
    • Sour smell of Breath

If you see any of the following, it is best to make an appointment with your doctor.

Also, the smell of infection with frequent urination, Bad smell of urine during the period of taking new drugs and pain in the lower abdomen, in these cases, it is better to consult a doctor. It is strongly recommended if you are pregnant and notice bad smell of urine, especially if you have urinary symptoms, You should inform your doctor as soon as possible.

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