Self-assessment of rectal cancer is unreliable. Early symptoms of rectal cancer are usually not obvious, and self-assessment is inaccurate, one must go to regular hospitals for comprehensive examination in time to make a clear diagnosis. Early stage of rectal cancer usually does not have obvious symptoms, with the development of the disease, corresponding symptoms will appear, such as frequent bowel movement, change of bowel habit, feeling of incomplete bowel movement, feeling of anus dropping before defecation, lower abdominal pain, urgency and heaviness, etc. Each person’s specific situation is different, clinical manifestation is different. Each person’s specific situation is different, and the clinical manifestations are also different, so self-judgment is not reliable and inaccurate. It is recommended to do regular medical checkups, especially for high-risk groups, such as those with rectal adenomas and inflammatory bowel disease; or those with chronic constipation, mucous blood stools, chronic diarrhea, chronic appendicitis or history of appendectomy, chronic cholecystitis and other diseases; or those older than 50 years of age should be screened regularly. Early diagnosis and treatment can greatly improve prognosis. When you suspect that you have rectal cancer and other diseases, you must go to regular hospitals in time for comprehensive examination, timely exclusion or clear diagnosis and standardized treatment, and do not make judgment on your own to avoid delaying your condition.