Irritable bowel syndrome or IBS is a gut disorder that is characterized by bouts of diarrhea and constipation, bloating or cramps. The main cause...
High-fat foods may trigger and worsen symptoms of an IBS attack. This is because fatty components may increase the intensity of intestinal contractions caused by the natural gastrocolic reflex in the body. If your digestive system is sensitive, it is better to avoid fried and fatty foods, such as hamburgers, fried fish, fried meat, French fries, sausage, chips, bacon, pizza, and more. 
FODMAP refers to short-chained carbs in food that make it more difficult for the body to absorb them. Products with high levels of these components may be bad for those with IBS because of their osmotic effects and fermentation. While veggies are an essential part of a balanced diet, you should limit your consumption of high-FODMAP products when you have IBS. These include celery, cauliflower, Brussels sprouts, beets, asparagus, mushrooms, peas, onions, shallots, or artichokes.