Is it Normal for a Baby to Have Smelly Gas?

Written by elizabeth smith
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Is it Normal for a Baby to Have Smelly Gas?
There are many reasons why babies can pass smelly gas. (baby image by Diane Stamatelatos from

Newborn babies normally have that wonderful new baby smell. But as babies mature, their gas can produce some strong aromas. In most cases, bad smelling gas is no reason for concern.

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Gas Odor Causes

Gas consists of various vapours, most of which are odourless. However, bacteria naturally present in the colon can release gas that contains sulphur, producing a bad odour. This occurs when the bacteria breaks down carbohydrates that weren't fully digested in the small intestine.

Gas-Producing foods

Foods that produce bad gas in one person may not affect another. As a baby begins to eat solid food, parents may notice that certain foods cause more gas than others. Foods that commonly produce unpleasant smelling gas include milk products, beans, broccoli, peaches, pears, apples, bran, soda and fruit juice.

Food Intolerance

According to the Texas Children's Pediatric Association, bad smelling gas is often caused by a food intolerance, such as lactose intolerance. The bacteria in the colon converts the undigested substance into gas.


The National Institute of Diabetes and Digestive and Kidney Diseases suggests recording a food diary to identify the foods that trigger gas.


Foul smelling gas can be a sign of a serious health condition. If a baby does not gain weight or passes loose stools for more than seven days, consult a paediatrician.

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