Symptoms and diagnosis of rectal cancer: Rectal cancer includes cancer between the dentate line and the sigmoid colorectal junction, accounting for about 60% of colorectal cancer, mostly found in the rectal jug abdomen, about 2/3 of which are below the plane of peritoneal reflexion, with higher incidence in the elderly, mostly above 60 years old, and in recent years. The youngest case I have seen is 15 years old, and patients younger than 30 years old account for 1-4%, with more men. The general symptoms of rectal cancer appear early, often with a sense of urgency or unclean bowel movements, and can also cause obstruction or changes in bowel habits. 90% of patients visit the doctor with blood as the first symptom, which can be easily misdiagnosed as bleeding hemorrhoids and delay treatment. Symptoms related to rectovaginal fistula. Invasion of sacral plexus nerve can cause perianal and sacral pain. The diagnosis of rectal cancer is made by medical history. Specialist examination. Colonoscopy. However, unfortunately, most patients are diagnosed late, which means that although the examination methods of this disease are becoming more and more advanced, most cases are still not diagnosed early clinically. The reasons for this are summarized as follows: 1. Patients do not pay enough attention to hemorrhoids: they are mostly found in remote and poor areas, with limited economic conditions and lack of medical knowledge, and most patients still treat themselves with hemorrhoids. Basically, every anorectal doctor has more or less encountered patients with misdiagnosed rectal cancer, and often there is no way back. The patient was diagnosed with hemorrhoids, but the gas was actually done in the clinic hemorrhoid surgery, the symptoms did not reduce after surgery, and a lot of bleeding after the hemorrhoid surgery referred to our hospital, confirmed the diagnosis of terminal rectal cancer, although only a few months after multiple treatments disappeared in the world, leaving a heavy burden for the not rich family, of course, this phenomenon with people’s living conditions and national investment in grassroots health care, in Of course, this phenomenon is gradually decreasing with people’s living conditions and national investment in primary health care, but it is enough to attract attention.