Manning criteria
IBS is diagnosed if three of the following are present:
	Abdominal pain
	Pain relief with defecation
	Increased stool frequency with pain
	Looser stools with pain
	Mucus in stools
	Feeling of incomplete evacuation
Rome I criteria
IBS is diagnosed if the following are present:
	At least three months of continuous or recurrent abdominal pain that is relieved with defecation and/or is associated with a change in stool consistency
		Plus, at least two of the following on at least 25 percent of days:
		Altered stool frequency
		Altered stool form or passage
		Passage of mucus
		Bloating or feeling of abdominal distension