Hemosuccus pancreaticus (HP) is a rare cause of gastrointestinal bleeding (GIB) that should be considered in a patient with a history of pancreatitis and GIB. A 17-year-old female presented with nausea followed by an episode of hematemesis. Fourteen weeks prior to presentation, she had 3 episodes of vomiting within a week. Six weeks prior to presentation, she developed abdominal pain and was diagnosed with acute idiopathic pancreatitis. Computed tomography (CT) revealed a cystic lesion arising in the gastroduodenal artery (GDA), and coil embolization was performed. There are no reported cases of HP in an adolescent with acute idiopathic pancreatitis.