Nausea occurs as a result of the irritation of some of the nerves responsible for irritation of the irritable bowel, and the nerves responsible for nausea are stimulated, and it also occurs as a result of intestinal cramps during the digestive changes caused by irritable bowel. The patient may suffer from nausea in the morning, or during exposure to episodes of irritable bowel pain, Or as a result of eating some foods that stimulate the colon