Symptoms
The
primary symptoms of IBS are abdominal pain or discomfort in association
with frequent diarrhea and/or constipation, a change in bowel habits.
There may also be urgency for bowel movements, a feeling of incomplete
evacuation (tenesmus), bloating or abdominal distention.People with
IBS more commonly than others have gastroesophageal reflux, symptoms
relating to the genitourinary system, psychological symptoms, fibromyalgia,
headache and backache.
IBS
can be classified as either diarrhea-predominant (IBS-D), constipation-predominant
(IBS-C) or IBS with alternating stool pattern (IBS-A or pain-predominant).
In some individuals, IBS may have an acute onset and develop after an
infectious illness characterised by two or more of the following: fever,
vomiting, diarrhea, or positive stool culture. This post-infective syndrome
has consequently been termed "post-infectious IBS" (IBS-PI).