Irritable Bowel Syndrome, or IBS, is a digestive disorder. The large intestine of the digestive system, the colon, is affected by this condition. Cramping, stomach discomfort, bloating, gas, diarrhea, and constipation are all symptoms of irritable bowel syndrome (IBS). A fiber-rich diet is beneficial, i.e., non-digestible carbohydrates make up the bulk of most grains, fruits, vegetables, and legumes, making dietary fiber an essential part of a healthy diet.