Patients with pancreatic cancer may exhibit clinical symptoms of bloody stools, and the possible causes are as follows: First, the lesion of pancreatic cancer invades organs and tissues such as the gastrointestinal tract, causing damage to the mucous membranes, which clinically results in bloody stools. Second, if the pancreatic cancer metastasizes to the liver, liver function is impaired. Some patients may develop hyperactive splenic function, leading to a decline in platelet counts. When platelet levels drop to a certain extent, spontaneous visceral bleeding can occur, which may also manifest as bloody stools clinically. Third, in the late stages of pancreatic cancer, the disease may cause metastasis to multiple organs, leading to the complication of disseminated intravascular coagulation. This results in impaired coagulation function, making gastrointestinal bleeding likely, which is also clinically manifested as bloody stools.