The symptoms of abdominal discomfort and blood in stool are mainly considered to be related to digestive tract tumor, constipation and anal and intestinal diseases. 1. Tumor of digestive tract: such as colon, rectal cancer and other diseases, which can lead to abdominal discomfort, blood in stool and other symptoms. 2. Constipation: Fecal matter is retained in the intestines and fermented with intestinal flora, which can trigger obvious discomfort symptoms such as abdominal distension. When defecating, the symptoms of difficult defecation and dry stools will appear, and even lead to anal injury and the phenomenon of slight blood in stool. 3. Anal and intestinal diseases: such as anal fissure, hemorrhoids and other diseases, can lead to the symptoms of blood in the stool. Some patients will also be induced by pain and constipation, which will lead to abdominal discomfort. Abdominal discomfort, blood in the stool, there are many other reasons, the above symptoms, we must pay attention to, as soon as possible to seek medical treatment.