Gas is caused by swallowing air and the breakdown of food in your digestive tract. The consequences are usually burping, feeling bloated, or passing gas. On average, most people pass gas at least 14 times per day. Some people have more gas than others, which may be uncomfortable or embarrassing.
The primary symptoms of IBS are abdominal pain or discomfort in association with frequent diarrhea or constipation and a change in bowel habits. There may also be urgency for bowel movements, a feeling of incomplete evacuation (tenesmus), bloating, or abdominal distension.
1 Problems with brain-gut signals may cause IBS symptoms, such as changes in bowel habits and pain or discomfort. 2  GI motor problems. 3  Normal motility, or movement, may not be present in the colon of a person who has IBS. 4  Slow motility can lead to constipation and fast motility can lead to diarrhea. Problems with brain-gut signals may cause IBS symptoms, such as changes in bowel habits and pain or discomfort. 2  GI motor problems. 3  Normal motility, or movement, may not be present in the colon of a person who has IBS. 4  Slow motility can lead to constipation and fast motility can lead to diarrhea.