It can make the stomach feel stretched and puffy, and is generally uncomfortable, it said.
Certain foods in your diet could be causing your stomach bloating, as well as eating too fast, or too much.
Eating blackberries could be adding to your trapped wind pain, scientists have claimed.
Blackberries take longer to break down in the stomach than some other fruits, which could be causing bloating, said digestive specialist York Test Laboratories.
Blackberries contain carbohydrates that stay in the digestive tract for longer than normal, it said.
That means they aren’t completely absorbed by the body, leading to trapped wind.
“Whilst delicious and high in antioxidants, these innocent looking little hedgerow fruits are packed full of polyols,” said York Test.
“Polyols – also known as ‘sugar alcohols’ – are carbohydrates commonly used in the synthesis of artificial sweeteners.
“Whilst less calorific than sugar, polyols take longer to break down, and stay in the digestion system for longer.
“This means they’re not always fully absorbed by the body, resulting in gas and bloating.”
You could also be at risk of stomach bloating by eating tomatoes, it added.
Tomatoes have a high acidic content, which stimulates stomach acids in some individuals. These acids can lead to bloating and excess gas.
But, removing the skins of tomatoes after boiling can help to prevent bloating.
Other ‘surprising’ foods that could cause bloating include nuts, milk, avocado and onions, said York Test.
Stomach bloating may be caused by trapped wind, constipation, irritable bowel syndrome, or swallowing air.
Talking while eating could lead to swallowing air, which in turn, leads to bloating.
People are more likely to feel bloated after a big weekend – especially around the festive season.
Speak to a doctor if your bloating symptoms don’t go away, said the NHS.
It could be caused by something more serious, including ovarian cancer.