Why Am I Bloated After Eating? Common Causes and What Helps

By the GutBox team · · 6 min read

That tight, full, swollen feeling after a meal is one of the most common gut complaints there is. Usually it's harmless and passes within a few hours. But if it happens often, it's worth understanding what might be behind it, because the cause is often something you can change.

The most common causes

Gas from food and drink

The NHS lists a lot of gas in your gut as one of the main causes of bloating. Some foods produce more gas as they're digested, including cabbage, beans and lentils. Fizzy drinks add gas directly.

Swallowing air

Eating quickly, talking while you eat, chewing gum and drinking through a straw can all mean you swallow more air. The NHS suggests chewing with your mouth closed to help avoid this.

Constipation

If you haven't been to the toilet as often as usual, or your poo is hard and lumpy, bloating is a common side effect. Checking your stools against the Bristol Stool Chart can help you see whether constipation might be part of the picture.

Food intolerances

A food intolerance happens when your body has difficulty digesting a particular food or ingredient. Bloating is one of the most common symptoms, and it usually comes on a few hours after eating rather than straight away. Lactose, the sugar in milk, is one of the best-known examples. Read more in our guide to food intolerance vs allergy.

Large, late or rich meals

Big portions, eating late at night, and fatty, spicy or very processed food can all leave you feeling bloated. The NHS notes that fried and greasy food is harder to digest.

Hormones and other conditions

Many people feel more bloated around their period. Bloating can also be a symptom of conditions such as irritable bowel syndrome (IBS) and coeliac disease, which is why ongoing bloating should be checked by a GP.

Things that can help

Based on NHS advice, these are good things to try:

  • Eat smaller meals more often, rather than a few large ones
  • Slow down and chew with your mouth closed
  • Drink plenty of water
  • Exercise regularly, which helps your digestion
  • If you're constipated, add soluble fibre such as oats or linseed
  • Cut down on fizzy drinks, alcohol and caffeine
  • Limit foods that commonly cause wind, like cabbage, beans and lentils, if you notice they affect you
  • Avoid eating a big meal late at night
  • Gently massaging your stomach from right to left can help release trapped wind

Finding your own triggers

Bloating triggers are personal. Beans might be fine for you but onions aren't, or you might only notice problems with a large portion. The most reliable way to find out is to track it.

For a few weeks, note what you eat and drink, when bloating starts, and how bad it is. Over time you can see whether certain foods, drinks or situations keep coming up before you feel bloated. Our step-by-step guide to keeping a food and symptom diary explains how.

GutBox makes this quicker: snap a photo of your meal, log bloating in a tap, and it lines the two up for you. When a food keeps appearing before bloating, it's flagged as worth testing.

Sources

This article is for general information only and isn't a substitute for advice from a doctor, dietitian or other qualified healthcare professional.

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