Intolerance to Certain Foods. There are certain food items which can be responsible for a bloated stomach. Vegetables, such as broccoli, cauliflower, sprouts, cabbages, onions, and garlic are known to cause a bloated stomach. Some dairy products as well as wheat, also may cause this condition.ntolerance to Certain Foods. There are certain food items which can be responsible for a bloated stomach. Vegetables, such as broccoli, cauliflower, sprouts, cabbages, onions, and garlic are known to cause a bloated stomach. Some dairy products as well as wheat, also may cause this condition.