Bloating is a feeling that your tummy is over full or stretched. . Bloating can be caused by many different factors. Gas can build-up in your gut when you: -Eat a lot of salty food and carbohydrate. -Swallow a lot of air when you eat too fast. -Drink a lot of fizzy drinks. . Seek medical attention if you have bloating as well as: -Diarrhoea -Persistent or severe abdominal pain -Blood in your stools (poo) -Changes in the colour or frequency of your stools. -Weight loss without trying to lose weig