Functional gastrointestinal disorders (FGIDs), such as irritable bowel syndrome (IBS), are characterized by chronic digestive symptoms without identifiable structural abnormalities. Effective diagnosis and treatment require a psychosomatic perspective, which recognizes the complex interaction between the gut, brain, and psychological factors. A purely biomedical approach often fails to capture the full clinical picture. The biopsychosocial model, central to psychosomatic medicine, provides a comprehensive framework for understanding symptom development, influenced by stress, emotional regulation, past trauma, and behavioral responses. Cognitive behavioral therapy (CBT) exemplifies this approach by addressing maladaptive thoughts and behaviors that perpetuate symptoms. Evidence supports CBT’s role in reducing symptom severity and psychological distress. However, successful FGID management extends beyond CBT alone—it involves careful patient-doctor communication, validation of the patient’s experience, and integration of psychological, behavioral, and medical care. Psychosomatic assessment is essential for identifying factors such as anxiety, depression, somatization, and coping styles, which can guide individualized treatment. Ultimately, a psychosomatic approach enhances diagnostic accuracy, therapeutic relationships, and long-term outcomes for FGID patients.