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Smelly Urine in Infants: An Overview

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Urine may not smell good, but any foul or abnormal urine smell may cause discomfort and is a sign of infection. Read on to know more.

Medically reviewed byDr. Veerabhadrudu Kuncham

Published At October 30, 2023
Reviewed AtOctober 30, 2023

What Is Smelly Urine?

Normally urine does not smell good, but if it smells foul or abnormal, it may be due to an infection or other health conditions. But according to a few studies, smelly urine does not always indicate an infection. In studies, about one-third of the times were smelly urine; there were no urinary tract infections. But experts and doctors say that the foul smell in the urine is not a good sign. The foul odor may indicate an underlying health condition. Even if there is no urinary tract infection, there are high chances of some other health conditions. So it is very important to bring this to the pediatrician's notice, especially when fever symptoms accompany the smelly urine. Sometimes it is better to carry the soiled diaper to the pediatrician so the urine can be tested.

The research surveyed more than 300 children between one to 36 months of age with a symptom of fever, out of which 57 percent reported smelly urine is discovered to have urinary tract infections, and only 37 percent with stinky urine did not have urinary tract infections. Some researchers say that the smell in the urine is due to the intestinal bacteria that might have entered the urinary tract and increased in number at some point in time and leading to infection.

What Are the Causes of Smelly Urine?

There are various reasons for the smelly urine in infants. Following are the few reasons enlisted:

  • Dehydration.

  • Constipation.

  • Bedwetting.

  • Urinary tract infections.

  • Vaginal voiding.

  • Food or vitamins, or any medications can cause stinky urine.

Dehydration:

Dehydration is one of the most common causes of smelly urine. Urine is a combination of water and other waste products. If your child is dehydrated, that means the baby's urine contains more waste products than water content causing a foul smell due to increased waste products. The color of the child's urine tells us if the child is hydrated or not.

  • If the urine is transparent yellow, that means the color is normal.

  • The transparent color of the urine indicated the baby was hydrated more than required.

  • Pale straw indicates healthy and well-hydrated.

  • Dark yellow indicates that the baby is healthy but needs to be hydrated.

  • Amber or honey-colored urine indicates that the baby is dehydrated and needs to be hydrated.

Constipation:

Many parents believe that the cause of stinky urine is only urinary tract infections, but this is a myth. The fact is that due to constipation or hard stools, the bladder empties in a single attempt and the leftover urine in the bladder stinks.

Bedwetting or Nocturnal Enuresis:

Bedwetting is also called nocturnal enuresis. Most parents notice the urine smells stinky when the child has the habit of bedwetting. The causes of the stinky smell in the urine are unknown, but the child's urine may smell stinky, like cat pee. If the child has a habit of bedwetting regularly and the urine smells normal during the daytime, and urine stinks at night, it is not a big concern. No treatment is required for this.

Urinary Tract Infections:

Urinary tract infections are due to intestinal bacteria entering the urinary tract system through the urethra and multiplying. As mentioned, foul or stinky urine is not only due to urinary tract infections. The child may have some other symptoms along with with the foul odor. If the child has urinary tract infections, the following symptoms are noticed such as:

  • Burning sensation while passing urine.

  • The color of the urine may be cloudy or bloody.

  • Fever.

Vaginal Voiding:

If the child is forcefully stopping the urge to urinate, the urine goes back into the vagina and stays there, which can be a reason for the growth of bacteria in the bladder, causing the foul smell and also sometimes leaking out of the vagina. This is most commonly seen in children with their legs spread wide apart on the toilet seat like they are riding a horse. The other option can be sitting on the toilet in the backward position.

Foods, Vitamins, or Any Medications:

Some foods, vitamins, and medications cause smelly urine. Everyone knows that asparagus pee (pungent smelling urine), but many other foods and medicines can also cause smelly urine. Some of the foods that cause smelly urine are:

  • Brussels sprouts.

  • Onion.

  • Garlic.

  • Salmon.

Some medications taken regularly by the child can also change the smell of the urine in children, such as multivitamins, antibiotics, medicines for diabetes, and rheumatoid arthritis.

In breastfeeding babies, the bad smell in the urine may be due to the mother's feeding habits. If the mothers take the foods like asparagus, garlic, and onion, that make the baby's urine smell. If one notices any smell in the urine, keep track of the diet and also track the number of fluids that one takes daily.

What Are the Signs and Symptoms of Smelly Urine In Infants?

In babies with persistently stinky urine, one may detect the following signs and symptoms of probable underlying illnesses.

  • Urine that is foamy or hazy.

  • Urine that is dark, such as crimson, tea-colored, or pink-tinged.

  • Urine dribbling.

  • Fever caused by oliguria or a lack of urine.

  • Edema.

  • Dehydration symptoms include sunken eyes and a dry tongue.

  • Weakness.

  • Irritability.

  • Crying.

  • Lethargy.

When to Consult a Doctor?

If the symptoms do not go away and are for longer periods of time, take the baby to a doctor. Carrying a soiled diaper is a better idea, so the doctor idea comes to have a clear idea. Some symptoms can be relieved by home remedies but not all the time.

If the baby has blood in the urine, stools, vomiting, and fever, immediately consult the child's doctor for the right treatment.

What Are the Methods for Preventing Smelly Urine in Babies?

Meeting the baby's fluid needs through eating and fluids might dilute urine and lower its odor strength. If babies are well hydrated, they will have at least five wet diapers per day with light or straw-yellow urine. Diapers should be changed on time to avoid smelling. Treating and managing underlying problems also aids in the prevention of objectionable urine odor.

Conclusion:

The smell of urine is not good, but some of the smell may be foul and discomfort, which is due to any underlying condition or urinary tract infections. There are various causes for the smelly urine of infants. Do not neglect the conditions, and do not try home remedies. If individuals find any symptoms, such as fever or blood in the urine accompanied by the smell in the urine, immediately consult the pediatrician.

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