Non-occlusive mesenteric ischaemia (NOMI) is a life-threatening condition that requires emergent intervention and anorexia nervosa is a chronic eating disorder that requires careful medical and nutritional management. A 54-year-old woman with a history of anorexia nervosa and undergoing chronic haemodialysis developed abdominal pain and called an ambulance. On arrival, she was in shock and abdominal examination was consistent with diffuse peritonitis. Computed tomography scan suggested ischaemia from the distal ileum to the ascending colon. Emergency laparotomy revealed NOMI from the distal ileum to the transverse colon. The treatment strategy included staged operations and careful medical management to optimise nutritional support and electrolyte management with survival of the patient. NOMI and anorexia nervosa are both difficult to manage. Meticulous interdisciplinary management can result in a good outcome.