In IBS the normal rhythmic muscular contractions of the digestive tract become irregular, interfering with the normal movement of food and waste material. This leads to accumulation of mucus and toxins in the intestine, setting up a partial obstruction of the digestive tract, trapping gas and stools, which in turn causes bloating, distention, and constipation. IBS may affect the whole gastrointestinal tract, from mouth to colon. Malnutrition may result as nutrients are not absorbed properly. Causes are not well understood, possibly a virus or bacteria may play a role, diet, stress, overuse of antibiotics, antacids, or laxatives.
Diagnosis require ruling out other diseases with the same symptoms.
Tests include, barium enema, colonoscopy, rectal biopsy, sigmoidoscoy, and stool examination. Most people can lead active normal lives by changing their diets, getting regular exercise and replacing needed nutrients. Drink plenty of water. Eat a high fiber diet including plenty of fruits, vegetables plus whole grains and legumes. Psyllium powder regulates bowel movement-use daily.