The five-year survival rate of early rectal cancer patients after surgery can be as high as 70-90%, while the late stage is only 20-30%, which is a difference of 50-60% that can be completely fought for. The key lies in early detection and early treatment. So, how can rectal cancer be detected early? Early detection of rectal cancer requires the attention and joint efforts of both doctors and patients. Clinically, there are patients who have blood in stool for several months and think it is hemorrhoids but do not go to the doctor, and then go to the hospital for examination only when they are anemic and thin, and find that the cancer is close to one circle when they touch the anus, and there are also patients who are treated for hemorrhoids for several months but do not improve and go to the higher level hospital for examination and have advanced rectal cancer. This is what I often encounter in clinical practice. In the early stage of rectal cancer, patients may have no conscious symptoms due to the mild lesions, and even if they have clinical symptoms, they are often ignored because they are similar to other benign anorectal diseases. Therefore, we must patiently inquire into the medical history, carefully carry out examination, and never let go of every suspicious patient easily, and when inquiring into the medical history, we should focus on asking the patient about the stool (including whether there is mucus and blood stool, whether there is any change in the number of stools, whether there is thinning and flattening, and whether there is difficulty in defecation, etc.), the anal conscious symptoms (such as feeling of swelling, feeling of incomplete defecation, frequent feeling of stool, etc.) and whether there is any recent weight loss, etc. As long as there are symptoms of anal and intestinal diseases, we must make anal examination. As long as there are symptoms of anorectal diseases, we must do anorectal examination, especially rectal finger examination which is easy to perform and has a high positive rate. Even if the lesion is mild and there is stool inside, experienced doctors can feel the hardened cancer that is different from normal soft tissue. After finger diagnosis, we should carefully observe whether there is blood, mucus and color of attached stool on the finger sleeve, and then choose to perform proctoscopy, sigmoidoscopy or full colonoscopy if necessary. The above shows that early detection of anorectal cancer is not very difficult. Once patients have symptoms of anorectal disease, they should immediately go to hospital for examination. Even if there are no obvious symptoms, they should have regular anorectal examination once every six months to once a year. Doctors must take a detailed medical history when treating patients and must not neglect to perform finger diagnosis or sigmoidoscopy on patients with anorectal symptoms. Once early lesions or pre-cancerous lesions are found, timely treatment should be given. This not only can detect rectal cancer at an early stage, but also has a very important significance for the prevention of anorectal cancer. In the eyes of the general public, having cancer is a particularly horrible and terrible thing, and cancer patients will have very intense pain and unbearable suffering. However, here we have to draw special attention to the fact that rectal cancer patients generally do not have much pain, especially in terms of pain, even in the advanced stage of anal pain. Many rectal cancer patients, who have blood in their stool every day, do not go to the doctor for half a month, a month, several months or even a year because they do not have pain, thus missing the opportunity of early treatment, and we hope to draw people’s attention to this.