Le Syndrome de l’Intestin Irritable (SII)

Or IBS Irritable Bowel SyndromeI)


Irritable Bowel Syndrome IBS is a chronic gastrointestinal disorder. It is considered a functional digestive disorder because it affects certain functions of the body, such as intestinal transit. However, individuals with IBS generally do not exhibit any structural, biochemical or histological irregularities.que.


The exact cause of IBS is unknown. Different psychosocial and physiological factors could be involved. These factors include alteration in the enteric nervous system, intestinal hypersensitivity, abnormal gastrointestinal motility, disturbances in the interaction between the brain and the intestine, mild inflammation, activation of the immune system, increased intestinal permeability, and an alteration of the intestinal microbiota.l.


Symptoms of IBS may include chronic abdominal pain, altered bowel movements, diarrhea and / or constipation, a feeling of incomplete evacuation, abdominal distension, bloating, gas, and mucus in the stool. Symptoms can be triggered by certain foods or emotions eg. : stress, anxiety, etc. Symptoms can also be variable within the same individual and between individuals.idus.


The diagnosis of IBS is based on the presence of standardized symptoms, called the Rome criteria, and on the exclusion of other conditions.s.

Rome criteria

The diagnosis of IBS according to the Rome criteria is made in individuals who have experienced abdominal pain for at least one day per week in the past three months, with at least two of the following:

  • Pain associated with defecation
  • Pain related to changes in the frequency of stool diarrhea and / or constipationn)
  • Pain related to the change in stool consistency

Exclusion of other pathologiess

It is also important to perform additional examinations to rule out other pathologies that resemble IBS, such as celiac disease, Crhon disease, diverticular disease, lactose intolerance, intestinal cancer, etc. These tests are especially important in individuals who have certain warning signs, such as rectal bleeding or anemia, nocturnal bowel movement, unintentional weight loss, persistent diarrhea every day, recurrent vomiting, old age or fever.èvre.


There are four subtypes of IBS, classified according to the predominant transit: IBS with a predominance of constipation IBS-C, IBS with a predominance of IBS-D diarrhea, IBS with the presence of constipation and alternating diarrhea IBS -M, mixed and SII not classified in the absence of sufficient criteria.isants.

Nutritional treatment 

The nutritional treatment of IBS varies from one individual to another depending on the symptoms eg. : diarrhea, constipation, etc. and elements that seem to trigger them ex. : food and emotions. Depending on the individual, treatment may include a modification of the diet, eg an exclusion diet. : FODMAP, a modification of fiber intake, supplements, probiotics and prebiotics.iotiques.

Dietary recommendations

Depending on the symptoms and their triggers, dietary recommendations may include:

  • Increase the consumption of dietary fiber and hydration, especially in the presence of constipationon
  • To split meals and avoid drinking heavily at mealss
  • Eat at regular times and not skip meals
  • To eat slowly and chew well
  • To reduce gas-producing foods and habits that may promote laophagia eg. : drink through a straw or chew gum, especially in the presence of bloating and gasces
  • Avoid foods high in fats
  • Avoid or reduce gastrointestinal stimulants eg. : caffeine, nicotine, alcohol, especially in the presence of diarrheahée
  • To promote the regular practice of physical activity and stress reductions
  • To maintain an elimination routine eg. : FODMAP.P).

Finally, it is important to remember that dietary recommendations should always be personalized in order to meet the specific needs of each individual.






Article written by:

Marie-Noël Marsan, Nutritionist