Irritable bowel syndrome: diagnosis and symptom management.

Irritable bowel syndrome (IBS) is a very common problem affecting 10% of the population at some time. Its cause and pathogenesis, however, remain poorly understood. Diagnosis is usually straightforward and detailed investigations are only required when the presentation is atypical. Treating IBS is always a challenge. The concerns and expectations of the patient must be met, along with any associated psychosocial issues. Medication on its own without addressing all of these issues is usually unsuccessful.