Aerophagia is a digestive disorder that affects many people on a daily basis. It manifests as the involuntary swallowing of large amounts of air, which can lead to abdominal pain and discomfort. According to the Department of Health, an adult swallows 2 to 4 litres of air per day, which is considered the “normal” amount. Anything beyond that is classified as aerophagia.
Typically occurring after meals, aerophagia can become debilitating and interfere with daily activities when it is recurrent.
We often hear about bloating and flatulence, but a bit less about aerophagia. So, what is the difference between aerophagia, bloating, and flatulence? While these three terms may seem similar, they do not refer to the same conditions and do not all have the same causes.
Bloating refers to a sensation of swelling and distension in the abdomen. It is characterised by a feeling of a large, tight or even hard stomach. Bloating is often the result of gas in the gastrointestinal tract, but this gas does not always manifest as burping (eructation) or farting (flatulence).
Flatulence, or “gas,” refers to the expulsion of gas stored in the stomach through the anus. This gas may be odourless or, conversely, very unpleasant. Flatulence is considered normal because it results from the fermentation of food in the stomach, but in excessive amounts it can cause discomfort.
Bloating is a condition of abdominal distension, whereas flatulence is the result of an excess of gas in the stomach. Aerophagia is ultimately nothing more than one of the causes of these symptoms.



