Breastfed Baby Gas Smells Like Rotten Eggs

Last Update:

Breastfed Baby Gas Smells Like Rotten Eggs

The main culprit for breastfed baby gas smells like rotten eggs; is your baby’s digestive system. It was not developed to the stage where it can easily break down the breast milk that the baby is getting. This usually occurs when your newborn is unable to properly absorb lactose through its digestive system.

Such a typical smell can also be the result of an infection, particularly if you are not able to determine whether something else is causing it. In children, this type of illness is known as infant gastroenteritis and should be closely monitored by the parents and the baby’s pediatrician.

There are some symptoms that usually happen when this infection occurs. Most often there is vomiting, high temperature, change in bowel and eating habits. 

Once you start introducing your baby to solid food, frequent gasses may happen. That’s because the baby’s digestive system is trying to adapt to the new food, and it’s taking some time to break down the food during the digestion process. As sometimes gasses can be painful, especially for infants, make sure your little one is feeling as comfortable as possible.

You can do that simply by making sure that they are being fed in the proper position, so the food can go down the bowels smoothly, making digestion easier. When the feeding is over, don’t forget to help your baby burp. This way the infant will release any trapped air that occurred during feeding and prevent any possible problems.  

Breastfed babies can avoid smelly gas by following some of the useful advice. First, mothers should watch over what they are eating. They should be aware that whatever they eat will eventually be transferred to the baby through the milk. That’s why it’s important to stay away from spicy, smelly, and complex foods that can lead to gasses when digested.

It can also happen that the infant can digest dairy products that the mother is eating. So, try to avoid those types of products for a while to see how your baby will react. This especially refers to cow milk as it is the most difficult dairy product for a baby to digest. 

Once the baby starts eating solid foods and constantly is trying something different, it can result in a bad gas smell. Especially if the little one is eating a lot of beans, broccoli, and cereals because these foods are high in sulfur compounds that are known for causing farting.

Try to change the baby’s diet but make sure it’s still getting enough vitamins and nutrition. The chosen healthcare provider can help you with that in the long term. Even though many parents think that breastfeeding is supposed to be easy and fun, sometimes it can be painful for both sides. 

This usually happens when breastfed baby gas smells like rotten eggs, or even smells like alcohol. At this point, parents should rethink where the problem occurs. Several reasons may contribute to this, but the situation can be handled over time if you discover the main culprit. 

What causes smelly gas in breastfed babies?

Breastfed Baby Gas Smells Like Rotten Eggs

The reason why your breastfed baby has smelly gas is probably that the infant was eating too fast, was swallowing too much air during feeding, or digesting food improperly.

Babies still haven’t developed a mature gastrointestinal system, so they are prone to experiencing frequent gasses. Even though gas can be unpleasant for babies and sometimes a bit painful, intestinal gas is still harmless.

The food the mothers eat affects their baby’s gas and fussiness, which causes many parents to become worried. There are a few types of research that have proven that certain food that a mom is eating can lead to intestinal problems in her baby.

Certain foods in a mom’s diet might cause an infant’s stomach to react, however, there is no specific list of foods that breastfeeding mothers should avoid.

Although the majority of babies tolerate the food their mother is eating, paying close attention to food patterns is important. In case your baby becomes fussy after you eat a certain type of food, try to avoid that for some time to see how the baby will react.

Overall, many parents stated that food like beans, broccoli, spinach, onions, and spicy food in general cause baby’s gas, while other infants are able to digest them with ease.

Why does my baby’s sick smell like egg?

Breastfed Baby Gas Smells Like Rotten Eggs

If your baby’s breath smells like rotten eggs it is because of the reflux and the way food was digested. Reflux is a common thing in newborns. The reason for this is the immature anatomy of their digestive system.

When it comes to adults, there is a thing called the sphincter, a muscle that looks like a ring, located above the stomach. After eating, this muscle tightens in order to prevent food from going up again.

When it comes to newborns, the sphincter works differently because it does not tighten like it does to adults. Therefore, a baby’s food/milk can travel back up much easier. This is the thing that is called reflux.

This thing is especially present in a newborn under six months that has only a liquid diet. Because infants spend a lot of time on their backs, milk usually passes back up much easier even before it has been digested.


When introducing solid foods your baby can have problems with gas as well as changes in its stool. This is totally normal and expected since babies still don’t have fully developed digestive tracts. However, this can happen even when your newborns are still being fed only through the source of milk. 

It also happens that the breastfed baby gas smells like rotten eggs. The main culprit is your baby’s digestive system that is still slow and not fully developed.

It will need some time until it’s at the stage where it can easily break down the milk that the little one is getting. This happens when your baby has trouble absorbing lactose through its digestive system.

However, if you think that this is not the problem because your baby has been fed with the same milk for quite some time, maybe the infection has occurred. In youngsters, this type of problem is called gastroenteritis.

If your baby has this type of problem, make sure you monitor it closely with the constant care of your chosen pediatrician.

Photo of author


My name is Catherine. I'm a Mom and one of the avid writers working on HerScoop!