Diarrhea is a bothering and disturbing sign of many disorders. If you don’t manage to find the exact cause, you may be suffering from it for a while. Among all symptoms of the irritable bowel syndrome (IBS), this is the most popular sign shared by every second patient with this trouble. However, it still means that in 50% of cases diarrhea is absent. At the same time, the patients complain of many other symptoms.