When would hematochezia occur secondary to upper GI bleeding?

Critical Thinking Week 2
-Why is pain assessment more challenging in critically ill patients?
-Which team members would the nurse consult to assist with the nutritional support of critically ill patients?
-What actions and treatments can reverse AKI at the initiation phase?
-When would hematochezia occur secondary to upper GI bleeding?
-Why are bowel sounds often hyperactive in GI bleeding?
Use this as reference: Sole, M. L., Moseley, M. J., & Klein, D. G. (2017). Introduction to critical care nursing. St. Louis, MO: Elsevier.