Study aim: A Comparative Study of The Effects of Mindfulness-Based Cognitive Therapy and Progressive Muscle Relaxation on Symptoms, Fatigue, and Visceral Hypersensitivity in Inflammatory Bowel Disease Patients Design: This Study is a Randomized Block Clinical Trial with Two Intervention Groups and Three Stages of Pre-Test, Post-Test and Follow-Up. It Will be Conducted in an Unblinded Manner on 72 Patients with Inflammatory Bowel Disease (2 Intervention Groups of 36). Patients Will be Included in The Study if They Agree and are Eligible and Will be Randomly Assigned to The Two Intervention Groups. (Randomized) Settings and conduct: The Trial Will be Conducted on Patients with Inflammatory Bowel Disease at The Porsina Hakim Clinic, Isfahan. Individuals Participating in The Intervention Groups Will Receive Mindfulness-Based Cognitive Therapy and Progressive Muscle Relaxation in a Group Setting for 8 2-Hour Sessions (2 Months). Participants/Inclusion and exclusion criteria: Entry conditions: 1) Possessing Minimum Age of 18 Years and a Maximum Age of 65 Years 2) Definitive Diagnosis of Crohn's Disease or Ulcerative Colitis by a Specialist physician, 3) Ability to Participate in 8 Treatment Sessions, 4) Having at Least a High School Diploma, 5) Completing the Informed Consent Form 6) Ability to Perform Light Exercise Non-entry conditions: 1) Having Major Psychiatric Disorders, 2) Participation in Other Psychosocial Trials Intervention groups: Intervention Group One: They Will Receive Mindfulness-Based Cognitive Therapy. This Treatment Will Consist of 8 Two-Hour Sessions and Will be Delivered in a Group Setting. Intervention Group Two: They Will Receive Progressive Muscle Relaxation. This Will Consist of 8 Two-Hour Sessions and Will be Delivered in a Group Setting. Main outcome variables: Symptoms, Fatigue, and Visceral Hypersensitivity