Aspirin Aspirin may not be healthy for the DIGESTIVE TRACK it can also sometimes cause serious bleeding in the upper GASTROINTESTINAL tract. A study director of medicine said the risk of bleeding is directly related to aspirin. She also stated that ¼ of an aspirin is good for a day (about the same amount of a baby's aspirin). Another thing she stated was that if you are taking aspirin for arthritis it may cause severe bleeding. Late last moth in a journal called Lancet , Lancet compared the use of aspirin among 550 people admitted to the hospital with serious bleeding from the stomach or DUODENUM with the aspirin