Diarrhea is the most common symptom. One of the three principal types of the disorder is IBS. It affects roughly one-third of IBS patients. A study of 200 adults discovered that those with diarrhea-predominant IBS had 12 bowel movements per week on average, more than twice the amount of adults without IBS.
In IBS, accelerated bowel transit can also cause a sudden, strong urge to urinate. Some patients report that this is a significant source of stress for them, with some even avoiding social situations out of fear of a sudden onset of diarrhea. Furthermore, stool in the diarrhea-predominant type is loose and watery, and it may contain mucus.