For early detection of rectal cancer, regular physical examination and timely medical consultation are needed, as follows: First, regular physical examination: if there is no discomfort, regular physical examination is also needed, generally a comprehensive physical examination once a year is enough, and for those who are over 40 years old or have family history of tumor or intestinal polyps, annual physical examination is better to do colonoscopy. Second, timely medical care: abdominal pain, blood in the stool or diarrhea, constipation and other symptoms, must go to the hospital as soon as possible to improve the abdominal CT and gastroscopy and other aspects of the examination, if there are early intestinal lesions, can be early detection, early diagnosis, early treatment. To sum up, regular medical checkups and timely medical consultation when there is a problem, strive to achieve early detection, early diagnosis and early treatment, so that some lesions, including rectal cancer lesions, can be detected early.