Colonic vascular malformations do not usually develop into cancer. Colonic vascular malformation refers to unexplained abnormalities of colonic blood vessels, which may be related to acquired degenerative changes of blood vessels, congenital abnormalities of blood vessel development and chronic ischemia of mucous membrane, etc., or congenital underlying factors that make the blood vessels prone to malformations later in life, and usually do not form cancer. Usually, there are no symptoms of colonic vascular malformation, and it only shows fresh blood stool or dark red blood stool when bleeding, repeated intermittent bleeding will be accompanied by different degrees of anemia, and if there is a large amount of bleeding, it is easy to cause shock, and most of the bleeding can be stopped by itself, which is self-limiting to a certain extent, and clinically accompanied by abdominal pain and other symptoms. Colon vascular malformation after active treatment, can improve the bleeding symptoms of patients, if the treatment is not timely, there may be serious complications, endangering the lives of patients, which can be cured through treatment. It is recommended that patients go to regular hospitals in time, under the diagnosis of the doctor, according to the specific condition of the patient’s performance, to take targeted treatment, so as not to cause adverse effects on the body, triggering the emergence of other diseases.