Irritable bowel syndrome or IBS may present with abdominal pain or discomfort, cramping, bloating,
gas, whitish mucus in the stool,
bloated abdomen,
diarrhea, and/or constipation. It affects the colon, or large bowel, which is the part of the digestive tract that stores stool. Women with IBS often have more symptoms during their menstrual periods.Diagnosis is fulfilling the Rome criteria and some medical tests such as lower gastrointestinal (GI) series or Colonoscopy.