First and foremost you must adhere to a soft diet, that does not upset your stomach too much. That means limiting acidic, fatty and or high calorie meals, and focusing more on light meals high in fiber and or nutrients. Secondly I would suggest adequate fluid hydration as to heal your intestines, promote flow and detoxify your system, as well as to replenish much of the water lost in diarrhea. You must also take a look at your medical regimen (medications) to determine if there are any which could cause further stomach upset with individuals suffering from IBS. Lastly, as IBS is highly affiliated with stress, I would suggest, if applicable to your situation, that you take breaths, talk with people who are comforting about your worries and or life in general, and if possible, engage as many stress revealing activities as possible. I hope this advise has helped. Warm Regards.