Excessive gas is a common complaint with any type of ostomy. Typically, in the first few weeks after surgery it will be the worst. As the bowels become less swollen this should improve.
However, the gas is still likely to occur. Continue to limit gas forming foods: asparagus, cucumbers, broccoli, cabbage, onions, dried beans, fish, eggs, nuts, beer, and milk products (except ones with live cultures), and fish. Beano will help with these foods and with an ileostomy it is best to chew the Beano to improve its effectiveness. Foods that contain live, active cultures (yogurt, buttermilk, kefir) may also help reduce gas formation.
Other things that may help:
1) Eat small frequent meals (4-6 daily) rather than 3 large meals
2) Don’t chew gum
3) Don’t smoke
4) Don’t drink through a straw
5) Eat slowly and chew food thoroughly
6) Avoid carbonated beverages