What causes excessive gas, and how can I reduce it without a restrictive diet?
Passing gas is part of digestion. Swallowed air, fermentation of some foods and constipation can increase it. Gas alone does not establish IBS or bacterial overgrowth. Tracking meals and bowel patterns is more useful than immediately taking medicines or excluding many foods.
Details
Try focused changes
Eat slowly and reduce fizzy drinks or chewing gum if they trigger symptoms. Change one factor at a time instead of removing dairy, legumes and wheat together. Addressing constipation can help, although rapidly increasing fibre may temporarily worsen gas.
Do you need a special diet?
A targeted diet may suit selected conditions after assessment and should include food reintroduction, preferably with a dietitian. Gas odour alone is not a reason for antibiotics for suspected bacterial overgrowth. No medicine treats every cause.
When home adjustments are insufficient
Seek review for persistent or disruptive symptoms, particularly with weight loss, bleeding or recurrent diarrhoea. Severe pain, vomiting, distension and inability to pass stool or gas need urgent assessment.
Related reading: What causes persistent bloating, and when is it more than gas?.