What are the causes of gastrointestinal (GI) bleeding occurring during sleep?

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Last updated: May 21, 2025View editorial policy

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Differential Diagnosis for GI Bleeding while Asleep

  • Single most likely diagnosis
    • Peptic ulcer disease: This is a common cause of gastrointestinal bleeding and can occur at any time, including while the patient is asleep. The bleeding can be slow and intermittent or rapid and massive.
  • Other Likely diagnoses
    • Gastroesophageal varices: These are enlarged veins in the esophagus that can bleed easily due to increased pressure from the liver. Bleeding from varices can be severe and life-threatening.
    • Diverticulosis: This condition involves the formation of small, bulging pouches in the digestive tract, which can bleed, especially in older adults.
    • Angiodysplasia: These are abnormal blood vessels in the gut that can cause bleeding, often in older adults.
  • Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
    • Aortic enteric fistula: A rare but life-threatening condition where there is a connection between the aorta and the intestine, leading to massive bleeding.
    • Meckel's diverticulum: A congenital anomaly of the small intestine that can cause bleeding due to the presence of ectopic gastric mucosa.
    • Arteriovenous malformation (AVM): An abnormal connection between arteries and veins that can cause bleeding in the gut.
  • Rare diagnoses
    • Hemobilia: Bleeding into the biliary tree, which can be caused by trauma, tumors, or vascular malformations.
    • Hemosuccus pancreaticus: A rare condition where there is bleeding into the pancreatic duct, often due to a pancreatic tumor or pseudocyst.
    • Dieulafoy's lesion: A rare cause of GI bleeding characterized by a small, superficial ulcer with a large, exposed artery at its base.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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