Most people with IBS and SIBO have come to expect bloating after eating, but for some, the bloating and tightness can be worse before a meal.
If you often feel uncomfortable, gassy or swollen when your stomach is empty, there are a few possible reasons worth considering.
1. Gastritis
One common cause of bloating before eating is gastritis. This means the lining of your stomach is inflamed. When your stomach is empty, acid can irritate the lining more, causing a burning, bloated or heavy feeling.
Eating temporarily helps because food soaks up some of the acid and this creates a kind of buffer against the lining of the stomach which can soothe the irritation.
Signs it could be gastritis:
If your bloating often returns when your stomach is empty look for other signs of gastritis as well such as:
- Upper tummy bloating under your ribs
- A gnawing or burning feeling when you have an empty stomach
- Feeling better for a while after food
- Feeling sick
2. Low stomach acid
Low stomach acid (hypochlorhydria) can sometimes play a role in bloating before meals.
If your acid levels are low, food may not break down properly, which can slow digestion. This can leave leftovers sitting in the stomach for longer, so you might feel bloated or full even hours after eating your last meal.
Low acid means slower emptying
When stomach acid is low, food is digested less efficiently. If the stomach doesn’t fully clear, leftover food can ferment and gas can build up. Some people feel a lingering bloated, heavy feeling even hours after eating.
Possible overlap with mild gastritis
Low acid is often linked with chronic gastritis (for example, H. pylori infection can reduce acid production). So sometimes the feeling of relief after eating is partly due to soothing an inflamed stomach lining, rather than the low acid alone.
3. Stress and gut sensitivity
Your gut and brain are closely connected. Some people with IBS or functional dyspepsia feel bloated even before a meal if they feel anxious about eating or have a sensitive gut.
Maybe you’ve even noticed the thought of food or a stressful day can trigger your bloating.
What can help?
- Eat regular, gentle meals. Skipping meals often makes bloating worse.
- Chew food well and eat slowly.
- Avoid too much alcohol, coffee or spicy foods if you suspect gastritis.
- If it keeps happening, ask your GP to check for H. pylori, which is a common cause of chronic gastritis. This is a bacteria which can reduce the amount of acid your stomach makes, and increase sensitivity within the stomach.
When to get help
The NHS recommend you always see your doctor if you have:
- Unexplained weight loss
- Severe or worsening pain
- Sudden bloating that gets worse and doesn’t go away
- Vomiting blood or if you see dried blood in your poo (which might look like coffee granules).
Need support with bloating?
If bloating is getting in the way of enjoying food, I can help you work out what’s really going on and find practical ways to eat well without constant discomfort. You can book a free discovery call to talk to me about your symptoms and see how I can help – info@goodnessme-nutrition.com.
IBS Nutritionist
Hi, I’m Anna Mapson, registered Nutritional Therapist.
I help people with IBS and SIBO get control of unpredictable gut symptoms to find long term relief from painful and embarrassing IBS without restrictive dieting.
I can help you to:
- understand your digestion better, so you recognise your triggers
- eat a well balanced diet, with tasty meals that are simple to prepare
- reintroduce your trigger foods so you can get back to enjoying food again
Find more about my 3 month 1:1 Gut Reset programme.
