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Why does my baby smell fishy?

Understanding the Fishy Smell in Babies
When parents notice a fishy odor emanating from their baby, it can be alarming and puzzling. While babies are often associated with pleasant scents, a fishy smell can indicate underlying issues that warrant attention. Here’s a closer look at the potential causes and what parents should consider.
Possible Causes of Fishy Odor
1. Trimethylaminuria (TMAU):
One of the most notable conditions associated with a fishy smell is Trimethylaminuria, commonly known as Fish Odor Syndrome. This genetic disorder affects the body’s ability to break down trimethylamine, a compound found in certain foods. As a result, it accumulates in the body and is released through sweat, urine, and breath, leading to a fishy odor. While TMAU is rare, it can manifest in infants and may require dietary adjustments or other management strategies to mitigate the symptoms.
2. Dietary Influences:
If a breastfeeding mother consumes certain foods, such as fish or other strong-smelling items, these odors can transfer to the baby through breast milk. This can lead to a temporary fishy smell in the infant. Similarly, if the baby is on formula, certain ingredients might contribute to unusual odors.
3. Infections:
In some cases, a fishy smell can be indicative of an infection, particularly if it is accompanied by other symptoms. For instance, urinary tract infections (UTIs) can cause a fishy odor in urine, which might be noticeable during diaper changes. If parents suspect an infection, it’s crucial to consult a pediatrician for appropriate testing and treatment.
4. Digestive Issues:
Babies often experience various digestive changes, especially during the early months. If a baby’s poop has a particularly foul or fishy smell, it could indicate a digestive issue or intolerance, such as lactose intolerance or a reaction to certain foods. Monitoring the baby’s stool and discussing any concerns with a healthcare provider can help identify the cause.
5. Poor Hygiene:
While it may seem obvious, poor hygiene can also lead to unpleasant odors. Regular diaper changes and proper cleaning during baths are essential to prevent any buildup of bacteria that could contribute to a fishy smell.
When to Seek Medical Advice
If the fishy odor persists or is accompanied by other concerning symptoms—such as fever, irritability, changes in feeding habits, or unusual stool—parents should seek medical advice. A healthcare professional can conduct a thorough evaluation to determine if there is an underlying condition that needs to be addressed.
Conclusion
While a fishy smell in a baby can be concerning, understanding the potential causes can help parents navigate the situation. From dietary influences to possible medical conditions, being informed allows for timely intervention and peace of mind. Always trust your instincts as a parent; if something feels off, don’t hesitate to reach out to a healthcare provider for guidance.

Why does my baby have a fishy smell?

Trimethylaminuria (TMAU) is an uncommon condition that causes an unpleasant, fishy smell. It’s also called “fish odour syndrome”. Sometimes it’s caused by faulty genes that a person inherits from their parents, but this isn’t always the case. There’s currently no cure, but there are things that can help.

What bacteria causes fishy smell?

Bacterial vaginosis (BV) is a common vaginal infection that happens when some normal bacteria that live in your vagina overgrow, causing a bacterial imbalance. Symptoms include an off-white or gray vaginal discharge that smells “fishy.” BV is easily treatable with antibiotics from a healthcare provider.

What does a fishy odor indicate?

The vaginal discharge of women with bacterial vaginosis often has a prominent fishy odor. Intensification of this fishy odor by the addition of strong base to the vaginal discharge suggests that it could be due to trimethylamine, the substance responsible for the characteristic odor of spoiling fish.

What is fish odor syndrome in kids?

Trimethylaminuria, also known as Fish Malodour syndrome, is a rare condition, whose main feature is body odour resembling rotten fish. The estimated prevalence is 1%, but it is underdiagnosed because doctors are unaware of this disease.

What skin condition makes you smell like fish?

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.

Is it normal to smell a little fishy?

A strong unfamiliar and unpleasant odor — especially one that continues for several days and smells fishy – isn’t normal. A smelly vaginal odor may be a symptom of a health problem, especially when it accompanies other symptoms like a grayish-white vaginal discharge, burning and itching.

What vitamin deficiency causes fishy odor?

The disorder is most commonly caused by an inherited deficiency in flavin monooxygenase 3, the vital enzyme for the metabolism of trimethylamine, which is the compound responsible for the unpleasant odor.

What causes body odor to smell like fish?

Dealing with trimethylaminuria certainly has its difficulties, but you aren’t alone. For those who are unfamiliar, this genetic condition occurs when the body isn’t able to break down trimethylamine (a naturally occurring dietary compound) and causes individuals to give off a fishy odor.

What bacteria smells like fish?

Trimethylaminuria is a disorder in which the body is unable to break down trimethylamine, a chemical compound that has a pungent odor. Trimethylamine has been described as smelling like rotten or decaying fish.

Can hormonal imbalance cause a fishy smell?

Menstrual cycle and hormonal changes
This might change the smell of your vagina and discharge, and you may even describe it as fishy.

Natasha Lunn

Tash is an IBCLC and Business Coach helping fellow IBCLCs create fun, profitable businesses that are more than just an expensive hobby. Before becoming an IBCLC and starting her private practice - The Boobala, Tash graduated as an Osteopath in 2008 and has been in Private Practice in South West Sydney. She was also a volunteer Breastfeeding Counsellor and Community Educator with the Australian Breastfeeding Association for 6 years. Through her business, Your Lactation Biz, Tash coaches and creates products to help new and seasoned IBCLCs build businesses that suit their personality and lifestyle.

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