It is possible to palpate a lump in bowel cancer. If the tumor of rectum grows in the patient with thin abdominal wall, and the tumor is hard and large in diameter, there is a certain chance that it can be touched by palpation during abdominal examination. If the tumor cannot be touched, and there are some clinical symptoms such as irregular stool, black stool, bloody stool, post-stool urgency and heaviness (discomfort in the lower abdomen, wanting to defecate very much, feeling of incomplete defecation after defecation), anal swelling, etc., it also suggests that rectal tumors may be present. For the diagnosis of intestinal cancer patients, colonoscopy is usually used, and high resolution abdominal CT can be done at the same time, it is recommended to go to the hospital in time to do the corresponding examination, and standardize the treatment under the guidance of certain, if the mass is large, surgical resection is carried out when necessary, and attention should be paid to whether there is any adhesion and metastasis between this mass and other organs inside the abdominal cavity when the surgery is carried out.