The vast universe of infant feces is just one of the many shocks that come with navigating the early stages of motherhood. I immediately discovered, as a new mom, that I could learn a lot about my baby’s health and well-being from the contents of their diaper. Every feature of a newborn’s stool, including color, consistency, regularity, and yes, even scent, has a narrative to tell. Even though it’s not the most attractive subject, anyone who is interested in learning about the subtleties of baby care will find it to be intriguing. Understanding these indicators can provide valuable insights into the remarkable but intricate process of a newborn’s digestive system development. The process can be both confusing and illuminating.

Up to this point in our conversation, you may be perplexed or even scared if you smell anything strong like rotten eggs coming from your baby’s diaper. Parents frequently have concerns, about this matter so it’s crucial to address it with a blend of curiosity and care. To put a brief response on the subject in the headline, it is indeed natural for a newborn’s feces to smell like rotten eggs on occasion. This condition is typically associated with the baby’s food or the gut’s natural development. However, the best way to guarantee your child’s health and comfort is to know the underlying reasons, when to be worried, and how to handle it.

Newborn Poop Smells Like Rotten Eggs

Causes of Rotten Egg Smell in Newborn Poop

It’s normal to be alarmed when you come upon a diaper full of excrement that smells like rotten eggs. The main source of this odor is sulfur compounds, which are created during digestion. Understanding the factors that contribute to this situation can assist you in navigating it with finesse.

1. Nutritional Effects on Nursing Mothers: The food that a nursing woman consumes has a big influence on how her baby’s excrement smells. Babies who consume foods rich in sulfur, such as garlic, onions, broccoli, and dairy products, may have more strongly scented feces. Although the sulfur content of these meals is transferred through breast milk and can impact the baby’s digestive system, giving rise to that unpleasant rotten egg odor, they are entirely healthy for the mother.

2. The Developing Digestive System of the Baby: The digestive system of a baby is still developing and may react differently to formula or breast milk. During this maturation process, proteins and other nutrients are broken down, which occasionally causes sulfur-containing gasses to be released. Although it’s a typical aspect of growing, it may result in some unpleasant shocks.

3. Gastrointestinal Conditions and Infections: There are certain diseases, such as rotavirus, that can make a baby’s excrement smell especially horrible. Diarrhea, vomiting, and fever are symptoms of rotavirus infection in the stomach and intestines. Because of the way rotavirus affects the digestive system, the diarrhea it causes can be extremely fluid and smell strongly of unpleasant things.

4. Formula composition: Your baby’s feces scent may also be influenced by the formula you give them. Cow’s milk and soy-based formulas may affect a baby’s gut flora and digestion differently, perhaps resulting in more sulfuric chemicals in the feces. Certain formula additives may cause allergies or intolerances in certain newborns, which can also alter how their excrement smells.

5. Dehydration and Concentrated Stools: A baby’s excrement may smell harsher and become more concentrated if they aren’t getting enough water. This is because dehydration interferes with the digestive process, resulting in feces that are not only more odorous but also more difficult for the infant to pass.

Understanding these factors will help you identify the reasons behind why your infant’s poop may have an odor resembling that of rotten eggs. Even if it’s frequently a common occurrence, it’s crucial to monitor your baby’s general health as well as any further symptoms.

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is it normal for baby's poop to smell like eggs

Understanding Newborn Poop

When I first became a parent, I was shocked at how much thought I gave to excrement. Stools from newborns are quite variable in terms of color, texture, and yes, even smell. First, it’s all about meconium, the thick, tar-like material that marks the beginning of your baby’s bowel motions. This quickly gives way to stools, which might be green, brown, or even yellow and seedy. A baby’s unique digestive system and the kind of feeding (breastfeeding versus formula-fed) can both have a significant impact on the regularity and frequency. From one infant to the next, and even day to day for the same baby, there is a vast variance.

  1. Frequency: Since breast milk digests more quickly than other food, it’s common for babies to pass many stools each day, especially if they are breastfed. Some infants, however, may only have bowel movements every few days. This range of frequency is typically seen as normal as long as the stools are soft, and the infant doesn’t appear upset.
  2. Color: Mustard yellow, green, and brown are possible color combinations for newborn excrement. Even while these differences might be shocking, they frequently just indicate that the digestive process is in action. Only crimson, black (after meconium has gone), and white usually suggest bleeding or liver problems and should be immediately suspected.
  3. Consistency: A soft, somewhat loose stool is optimal for newborns. Infants given formula may have somewhat harder feces, but breastfed newborns often have more watery and seedy stools. While variations are common, stools that are abnormally hard or highly watery may indicate dehydration or nutritional problems.
  4. Smell: Newborn excrement doesn’t smell particularly bad at first. The scent may intensify when their food modifies, and a variety of bacteria begin to colonize their digestive tract. Because breast-fed babies digest food differently and have different gut flora than formula-fed babies, their feces often smell less.

Many of the worries that new parents have can be eased by being aware of these elements of newborn feces. It demonstrates the complexity and adaptability of the body during the initial stages of growth.

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why does my baby's poop smell like egg

When to Worry: Signs to Look Out For

While a newborn’s excrement occasionally smells like rotten eggs, other indications ought to raise suspicion and necessitate a visit to the physician. It’s crucial to look at the picture and consider signs and actions that could indicate a more significant issue.

1. Variations in Stool Color: As previously indicated, many hues in the spectrum of infant feces are normal, except red, black (beyond the meconium stage), and white. According to these hues, there may be bleeding, older blood from a higher gastrointestinal tract, or liver problems.

2. Increased Diarrhea Frequency or Volume: Although fluctuations in the frequency of bowel movements are common, an abrupt rise in frequency, particularly if it is coupled with an extremely watery nature, may indicate an infection or intolerance.

3. Signs of Dehydration: If a baby is having diarrhea, dehydration can be a severe worry. Less moist diapers, a dry mouth, sunken eyes, and a lack of tears when sobbing are warning signs to look out for.

4. Accompanying Fever or Vomiting: Fever or vomiting along with alterations in stool composition may point to an infection or other medical conditions requiring medical care.

5. extraordinary Fussiness or Discomfort: It’s advisable to contact your pediatrician if your child exhibits extraordinary fussiness, is weeping more than usual, or seems uncomfortable, particularly during or after bowel movements.

Prevention and Management

There are several tactics you may use to control and avoid the unpleasant odor of rotten eggs in your newborn’s excrement. By addressing the root causes, these methods seek to maintain your baby’s comfort and well-being.

1. Dietary Modifications for Nursing Mothers: If you are nursing, you might want to keep a food journal to monitor your intake and its impact on your infant’s diarrhea. There may be a trend whereby eating meals causes diapers to smell worse. Even while eating a balanced diet is vital, you might discover that cutting back on or avoiding items high in sulfur might help. Recall that you should always with your healthcare practitioner before making any dietary adjustments to be sure you’re still getting the nutrients you need.

2. Selecting the Correct Formula: The kind of formula a baby is fed can have a big influence on how their excrement smells. See your doctor about trying a new brand or kind if you think the strong odor is coming from the formula. Certain newborns may react more favorably to soy-based or hypoallergenic formulas, particularly if they are sensitive to or intolerant of the protein found in cow’s milk.

3. Hydration is Key: It’s important to make sure your kid is getting enough water, especially if they’re having frequent or runny feces. Although breast milk provides adequate fluids for newborns who are breastfed, more hydration may be required in some situations. Small quantities of water may be beneficial for formula-fed newborns, but it’s important to see your physician before giving your child any additional fluids.

4. Encourage a Balanced Gut Flora: Having a well-balanced gut flora helps improve digestion and perhaps lessen the incidence of foul-smelling feces. Probiotics can be given to nursing moms’ babies through yogurt or supplements, which help transfer healthy bacteria to the infant. To maintain a healthy digestive tract, look for formulas that contain probiotics and prebiotics for newborns who are given formulas.

By putting these ideas into practice, you can manage and even stop babies from having diarrhea that smells like rotten eggs. But it’s crucial to keep in mind that each infant is different, so what suits one might not suit another. Always get your pediatrician’s advice before making any big dietary changes for yourself or your child.

breastfed newborn poop smells like rotten eggs

Personal Experience and Advice

I immediately found out that dealing with the surprise of rotten egg-smelling excrement in my newborn’s diaper is a frequent problem that many parents encounter. With the help of our doctor and a process of trial and error, we were able to control and ultimately reduce the incidence. These are my observations and suggestions derived from my experience:

1. Patience and observation: It was helpful to keep a thorough journal of my baby’s feeding schedule, diaper changes, and any nutritional adjustments. It assisted us in figuring out trends and possible causes of the foul-smelling events.

2. Keep Lines of Communication Open with Your Physician: No matter how little the issue, never be afraid to bring it up with your physician. Their knowledge and certainty can offer comfort and useful answers.

3. Experiment with Dietary Changes: If you’re nursing, don’t be afraid to make dietary changes if you follow a doctor’s advice. It’s incredible how minor changes may result in big gains.

4. Remain Informed: You can make knowledgeable decisions regarding your newborn’s care by learning about their digestive system and the variables that may affect how they smell.

5. Trust Your Gut: You are the one who knows your child the best—the parent. Trust your gut and get medical help if anything doesn’t seem right or if your baby appears uncomfortable or ill.

newborn breastfed baby poop smells like rotten eggs


Managing the diverse array of odors coming from your newborn’s diaper is just one of the many obstacles and surprises that come with becoming a parent in the early stages. Even though it might be concerning when your infant has diarrhea that smells like rotten eggs, this is often a normal stage of their digestive development. You can guarantee your kid stays healthy and comfortable by being aware of the possible reasons, recognizing when to be worried, and putting preventative and treatment measures into practice.

Keep in mind that each baby is different, so what is typical for one may not be for another. Don’t hesitate to ask questions or voice concerns to your physician; always keep the lines of communication open. Parenting is an adventure in learning and self-discovery, and although it may not always be enjoyable, there will surely be happy and amazing moments along the road. Have faith in your capacity to handle this voyage; you’ll need education, tolerance, and a good sense of humor for when things don’t go as planned.


Is the rotten egg odor coming from my newborn’s stool normal?

Indeed, it may be typical because of the kind of formula, the baby’s growing digestive tract, or dietary factors. But persistently unpleasant smells ought to be handled with a pediatrician.

What steps can I take to lessen my baby’s excrement’s sulfurous odor?

Dietary adjustments may be beneficial for nursing mothers. Make sure your infant is getting enough water, and if your physician suggests probiotic pills, think about taking them.

Is it wise for me to worry about green poop?

Green feces may be typical, particularly if it occurs seldom. Either the baby’s rapid passage of feces through the digestive system or certain food variables may be to blame.

How can I determine whether my child is dehydrated?

Keep a look out for symptoms such as fewer wet diapers, dry mouth, sunken eyes, or insufficient tears when sobbing. Should you suspect dehydration, speak with your physician.

Can the smell of my baby’s feces be affected by formula?

Due to variations in formula composition, infants who are given formula frequently have feces that are somewhat harder and more pungent than those who are breastfed.

When should I bring my baby’s feces to the pediatrician’s attention?

Visit to your physician is advised if your child exhibits symptoms of dehydration, blood, white or gray feces, discomfort, or extreme fussiness.

How can I guard against rotavirus infections?

As part of their regular immunization schedule, make sure your child gets the rotavirus vaccine. Maintain proper hygiene, particularly when it comes to handwashing, to stop the transmission of infections.


  • Zeinab Amiri

    I'm Zeinab Amiri, the CEO of our child care services website and a proud mother of two. My educational journey includes a degree from the University of Florida, where my passion for understanding the unique needs of Florida's children took root. As a mother, I bring a personal touch to my role, aiming to make a positive impact on the lives of young ones. Leading our website, I'm committed to providing valuable resources and insights for parents, caregivers, and educators.

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