The causes of stomach pain and blood pulling include upper gastrointestinal tract diseases, lower gastrointestinal tract diseases and systemic diseases. 1. Upper gastrointestinal diseases: for example, esophageal cancer, esophageal foreign body, gastric ulcer, duodenal ulcer, gastric cancer and so on. Bleeding caused by upper gastrointestinal diseases can be manifested as black stool, stomach pain and other symptoms. 2. Lower gastrointestinal diseases: for example, intestinal tuberculosis, enteric typhus (diseases caused by fever due to feeling cold), acute hemorrhagic necrotizing enterocolitis, amoebic enteropathy, ulcerative colitis, colon cancer, rectal cancer, etc. Bleeding caused by anorectal diseases is usually manifested as blood in stool. 3. Systemic diseases: for example, thrombocytopenic purpura, sepsis, etc. can also cause stomach pain and blood. There are many causes of blood in the stomach pain, need to do stool examination, abdominal examination, pathological analysis of the examination, if necessary, but also to do the colonoscopy gastroscopy examination and so on. Patients with stomach pain and blood pulling need to consult the doctor in time, not blindly take medicine, but according to the cause of the standardized treatment.