IBS can affect anyone at any age and around 1 in 5 people suffer with the disorder. In IBS the function of the gut is upset and this may manifest itself with pain and discomfort, others may suffer bloating and bouts of diarrhoea or constipation, or a combination of both, ranging from mild to severe.

In some cases people may experience feeling sick, headaches, belching, poor appetite and muscle pains.