Colon cancer, as its name implies, is a cancerous transformation of the colon, and since it is a cancerous transformation, the risk is very high. There are many early symptoms of colon cancer, mainly the following: 1. early changes in stool habits, mainly the increase in the number of bowel movements, blood in stool is also seen in colon cancer. 2. changes in the digestive tract, such as bloating, indigestion, hidden pain, intermittent right lower abdominal pain. 3. toxic symptoms. Because early stage colon cancer patients will have anemia, so they will have weakness, low fever, thinness, etc. 4.Obvious abdominal mass with hard texture and irregular shape, and the mass in advanced rectal cancer is more fixed and inactive. 5.Fecal metabolism or feces with mucus is caused by mixing blood or mucus with feces when intestinal peristalsis. 6.Intestinal obstruction situation appears, such as low obstruction, constipation.