The exact cause of Irritable Bowel Syndrome is yet unknown, but most experts think that it is related to problems with digestion and increased sensitivity of the gut.
One theory suggests that irritable bowel syndrome is caused by abnormal contractions of the colon and intestines.
Some people develop irritable bowel syndrome after severe gastrointestinal infection (eg Salmonella or Campylobacter, or viruses). It is not so clear how the infection triggers IBS to develop. However most people with…