Newborn Gas Smells Like Rotten Eggs: What You Need To Know


Welcoming a newborn into the world is one of the most exciting moments for any parent. However, it can also be a time of concern and worry, especially when it comes to your baby’s health. One common concern that parents have is the smell of their baby’s gas. If you’ve noticed that your newborn’s gas smells like rotten eggs, you may be wondering what’s causing this and if it’s something to be concerned about. In this article, we’ll explore everything you need to know about newborn gas and why it can smell like rotten eggs.

What Causes Newborn Gas?

First, it’s important to understand what causes gas in newborns. Gas is a normal part of the digestive process, and it’s common for babies to experience gas as their digestive system develops. Some common causes of newborn gas include swallowing air while feeding, sensitivity to certain foods, and an immature digestive system.

Why Does Newborn Gas Smell Like Rotten Eggs?

Now, let’s dive into why newborn gas can sometimes have a foul odor. In some cases, the smell of newborn gas can be attributed to the foods that the mother is eating. Breastfed babies may experience gas if their mother consumes foods that are high in sulfur, such as broccoli, cauliflower, or eggs. When these foods are digested, they can produce hydrogen sulfide gas, which can give off a rotten egg smell in your baby’s gas.

Formula-Fed Babies and Rotten Egg Smell

If your baby is formula-fed, the smell of their gas may be a result of the formula itself. Some formulas contain sulfur amino acids, which can also produce a rotten egg smell in your baby’s gas. In addition, some babies may have difficulty digesting certain types of formula, which can lead to excess gas and a foul odor.

When to Be Concerned

While the smell of newborn gas can be unpleasant, it’s usually not a cause for concern. However, there are some instances where foul-smelling gas can be a sign of an underlying issue. If your baby is experiencing other symptoms, such as vomiting, diarrhea, or a fever, it’s important to speak with your pediatrician to rule out any potential health concerns.

How to Help Your Baby

If you’re concerned about the smell of your baby’s gas, there are some steps you can take to help alleviate their discomfort. First, try burping your baby more frequently during feedings to help release any trapped air. You can also try changing your baby’s diet if you suspect that certain foods may be contributing to the smell of their gas. If you’re formula-feeding, speak with your pediatrician about switching to a different type of formula.


In conclusion, newborn gas that smells like rotten eggs is usually nothing to worry about. It’s a common occurrence in many babies and is often attributed to the foods they’re eating or the formula they’re consuming. If you’re concerned about your baby’s gas or are experiencing other symptoms, it’s important to speak with your pediatrician to rule out any potential health concerns. With a little bit of patience and some simple adjustments to your baby’s diet and feeding routine, you can help alleviate their discomfort and ensure that they’re happy and healthy.