Bloating ― especially if you’re going through hormonal changes, are gassy, or are a little constipated ― is common and often harmless, the NHS says. It can sometimes happen when people overeat, swallow air, chow down on a load of gas-producing veggies like cabbage or beans, or drink a lot of fizzy pop.But sometimes, bloating is caused by something more serious, like IBS, a food intolerance, coeliac disease, or even ovarian cancer. In fact if you’re bloated for a certain amount of time and it doesn’t go away, you should see your GP, the NHS says. When should I worry?Bloating that lasts longer than three weeks is worth seeing your doctor about, they say. The NHS also recommends visiting your GP if you feel bloated more than 12 times a month, or if you don’t notice any changes in bloating after chan