The recurrence rate of bowel cancer is the highest in the first two years after surgery, so patients need to be reviewed every three to six months. After two years, it can be changed to once every six months, and then persist for another three years. In this way, if there is no recurrence for a total of five years, it can be considered that the bowel cancer has reached clinical cure. Symptoms of recurrence after rectal cancer 1. Early symptoms: At the earliest stage, there can be abdominal distension, discomfort and indigestion-like symptoms, and then there will be changes in bowel habits, such as increased stools, diarrhea or constipation, and abdominal pain before stool. Later on, there can be mucus stool or mucopurulent blood stool. 2.Toxic symptoms: Due to blood loss and toxin absorption of tumor ulceration, patients often show symptoms of recurrence of colon cancer such as anemia, low fever, weakness, emaciation and swelling, especially anemia and emaciation. 3.Intestinal obstruction manifestation: incomplete or complete low intestinal obstruction, such as abdominal distension, abdominal pain (distension or colic), constipation or stool closure. Physical examination shows abdominal bulge, intestinal shape, local pressure pain, and hyperactive bowel sounds can be heard. 4.Abdominal mass: It is a mass of tumor body or infiltrated and bonded with omentum and surrounding tissues, hard, irregular in shape, some can have a certain degree of mobility with intestinal canal, in the middle stage, the tumor is more infiltrated and the mass can be fixed. 5.Mid-term manifestations: jaundice, ascites, swelling and other signs of liver metastasis, as well as malignant mass, anterior rectal concave mass, enlarged supraclavicular lymph nodes and other manifestations of distant tumor spread and metastasis.