Why your burping and wind spike over the festive season (and what actually helps)

As the festive season fills up with dinners and drinks, many people notice they’re burping more or passing extra wind. Most assume it’s the food, the fizz, or simply eating more. But that’s only part of the story. Why is it that one meal feels completely fine, yet another leaves you battling pressure, bloating or that urgent need to leave the table? And why can two people eat the same festive plate, yet only one ends up uncomfortable?

A surprising truth is that air swallowing, diaphragm mechanics and gut bacteria fermentation can often play a bigger role in burping and flatulence than the food itself. Once you understand the science behind the scenes, the symptoms feel far less random (and far more manageable). Since burping and flatulence share the spotlight this time of year, but come from very different gut processes, let’s unpack each separately so you can understand what’s normal, what’s fixable and what to do next…

When burping becomes bothersome

Burping is simply the release of gas from the upper digestive tract — mainly air that has entered the stomach. Occasional burping is completely normal, but when it becomes frequent, uncomfortable or socially embarrassing, you might be surprised to hear that behavioural factors (rather than specific foods) are usually the key drivers.

The biggest culprit is a condition called aerophagia, meaning excess air swallowing. This happens when too much air, often from unconscious air gulping, travels into the stomach instead of the lungs. Other common culprits include talking while eating, eating quickly, chewing gum, sipping carbonated drinks, and wearing tight waistbands that restrict stomach movement. Stress amplifies all of this. Shallow, rapid breathing tightens the diaphragm, causing people to involuntarily gulp air. Many people also swallow more air when feeling anxious — a brain–gut response that often goes unnoticed.

Here’s where the mechanics matter. When your diaphragm is tense and you’re breathing high in your chest, pressure regulation between your chest and stomach becomes less efficient. That leads to air accumulating in the stomach and being released upward as burping.

Research shows that improving breathing mechanics, especially shifting from chest breathing to slow diaphragmatic breathing, can significantly reduce burping by relaxing the diaphragm, lowering stomach pressure and reducing the amount of air swallowed in the first place.

Flatulence and fermentation: what’s really happening

While burping is mostly about air entering or being produced in the stomach, flatulence is about microbes fermenting food in the large intestine.

Your large intestine — the final 1.5 metres of your nine-metre digestive tract — houses trillions of microbes that break down undigested food. During this fermentation process, gases like hydrogen, carbon dioxide and methane are naturally produced.

Passing wind 10–20 times per day is considered normal and reflects a well-functioning microbial community. But frequency, smell and comfort levels can shift significantly based on what and how you’re eating — and the festive season changes all of these variables at once.

Why wind increases around festive eating

Several common festive habits can overwhelm digestion in the upper gut and ramp up fermentation in the lower gut, a perfect recipe for extra gas and a bit more ‘back-end pressure’ than usual.

Larger portions. When the upper gut is overloaded with food, it often struggles to digest food efficiently. Therefore, more undigested food can move into the large intestine, where microbes rapidly ferment, creating more gas.

Eating quickly. Fast eating reduces the prep time for your digestive enzymes and stomach acid, which are needed to break down food before it reaches the large intestine. Less breakdown = more fuel for bacteria = more fermentation.

Alcohol. Alcohol can disrupt the coordination of muscle contractions in the gut (known as motility). Irregular motility means food sits longer in certain areas and moves more quickly through others, both of which increase fermentation and gas production.

Fibre swings (both up and down)
– Sudden decreases (e.g., skipping breakfast to ‘save room’) slow gut movement, giving microbes more time to ferment
– Sudden increases, such as loading up on dried fruit, sprouts or beans, can overwhelm a microbiome that isn’t used to the volume. Research shows gradual fibre increase improves tolerance by encouraging the growth of fibre-loving microbes, a concept we call becoming fibre fit, (aka able to digest fibre without the side effects).

Food intolerances. If you notice an uptick in wind after eating soft cheeses, ice cream or custard, lactose intolerance may be involved. Undigested lactose reaches the large intestine quickly, causing a fermentation surge.

Stress and disrupted sleep. Stress reduces the gut’s ability to transfer gas into the bloodstream (where it’s cleared through your breath – not all gas is released as wind!). When this pathway slows, more gas gets trapped in your gut and must be released as wind. Poor sleep worsens this by raising cortisol, which interferes with this gas transfer.

Practical ways to support comfortable digestion