Acute bowel ischaemia is potentially life-threatening and requires prompt intervention. CT is first-line modality for abdominal imaging in the acute setting. The dual-energy technique improves conspicuity and identification of intestinal ischaemia and bleeding. This is a case report of a 43-year-old male patient with gastrointestinal bleeding after primary abdominal surgery. Dual-energy CT was able to identify otherwise occult intestinal ischaemia besides ongoing bleeding.