The prevalent dependence on fast food containing too much sauce, spices, salt, and chill is considered the most frequent cause of irritable bowel syndrome, contributing to form inflammatory tissues in the intestines which will lead to most IBS symptoms such as diarrhea alternated with rough constipation and bloating.
Specific food causing allergic reflex is a common known cause of irritable bowel syndrome. This one isn’t fully understood, and there are no listed food allergies so far, so keep in mind that any kind of food could cause allergy to anyone at any stage of life. Allergic reflex may cause similar manifestations to those of IBS.
Sensitivity to fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAP) such as those found in apples, apricots and peaches may contribute to causing IBS, as it promotes the sensation of thirst, leads to drinking more water, and this causes fermentation in the large and small intestine forming irritable tissue in the gut and subsequently cause irritable bowel syndrome.