Patient: I had an operation to remove a mixed tumor of the left parotid gland (pathological test was benign) at Peking University Stomatological Hospital on May 21 this year. The night before the surgery, I drank water made of laxative leaves as prescribed by the doctor. When I had a bowel movement at around 2:30 a.m., I had abdominal cramps and severe pain, and I had cold sweats and could not stand up on my own. After the surgery, I followed the doctor’s advice to avoid spicy and acidic stimulation, but in the past month, my stomach has been feeling uncomfortable and tingling, my bowel movements are normal but my digestion is not good. I have not been treated for this, but I would like to ask what kind of department I should see in this case. What tests should be done and what preparations should be made before the test? Patient Liu Li, Department of Traditional Chinese Medicine, Baotou Poverty Alleviation Hospital: Do I need to fast and retain stool before going to the hospital for examination? Thank you! Patient: I would also like to ask if I need to have a stomach examination in my case? Thank you! Liu Li, Department of Traditional Chinese Medicine, Baotou Poverty Alleviation Hospital: You should see the Department of Anorectology, bright red blood is bleeding closer to the anus, if the stomach bleeds it will be tarry stool.