Bullous pemphigoid (BP) is an autoimmune skin disease that occurs mainly in elderly patients; onset of BP is rare in childhood. Inflammatory bowel diseases (IBD), by contrast, have a pediatric onset in 25% of presenting cases, requiring expert multidisciplinary management. Here we report a pediatric case of IBD (involving stomach, duodenum, ileum, and colon-rectum) associated with a disseminated form of drug-resistant BP successfully treated by plasma exchange (PEX), extracorporeal photochemotherapy (ECP), and corticosteroid therapy. The addition of PEX and ECP to standard treatment induced no severe side effects, prompted a rapidly achieved complete and long-term remission, and allowed dose tapering of the immunosuppressive drugs over an 18-month follow-up.