Repressed emotions that are not dealt with will eventually spill over into the body, sometimes in the form of irritable bowel syndrome.
Treating the symptoms of irritable bowel syndrome will not remove the illness any more than sweeping the dirt under the carpet will make the dirt disappear. The symptom is not the illness; the symptom is merely the sub-conscious mind's method of bringing the problem to the conscious mind's attention.
When the symptom is treated it may disappear for a while and then reappear, or may show up again as a different symptom. To remove the illness, the true and real cause needs to be identified and resolved.
Using hypnosis it's possible to identify the cause of the condition and resolve it. Once properly resolved the condition fades.