It is possible that your baby’s farts are smelly due to food accumulation, but it may also be due to other reasons. When a baby has a build-up of food, it usually manifests itself as a distended abdomen, dry or sour stools, smelly farts, sour belching, and a distended and hot belly while feeding a large amount of food. However, if the above symptoms do not occur, it is also possible that the intestinal tract cannot digest the food completely due to excessive protein intake in the body. The food will produce a lot of gas under the action of intestinal bacteria, and the main component of the gas is mainly methane, which results in a very smelly fart. This situation can be alleviated by improving the structure of the diet, which in turn can alleviate the symptoms of smelly farts. In addition, once parents find abnormalities in their children, it is recommended to take them to the gastroenterology department for consultation and treatment under the guidance of a professional doctor, and to pay attention to feeding in moderation and eating less and more meals in the future.