Hi. Thanks for your query. Noted your history of stomach flu and want to know whether it can cause bloating. Certainly yes, Bloating is due to gas which is produced in large quantity due to disturbed bacterial flora whether the cause is bacterial or virus or otherwise. Hence I would advise you the following: First of all, send the sample of stool for tests as this will give the clue for the possible cause. If it shows infection, get a proper antibiotic, probiotic cover. Add on banana, yogurt/curds, activated charcoal. Watch for dehydration and electrolyte imbalance and get corrected if present. You would be fine.