CBT is based on the principle that thoughts mediate between external stimuli and emotional reactions.
Subjects can modify their thoughts and, consequently, the reaction.
CBT has been shown to be effective in many chronic pain disorders, including functional bowel diseases. CBT promotes healing by helping the patient discover and accordingly modify anomalies of thought, conceptions, perceptions, actions, and reactions that cause distress, and thus promote healing. CBT techniques can be learned and self-applied. Internet-delivered CBT is also effective.