Symptoms in the last period of rectal cancer life cannot be predicted, but this period of time is usually the late stage of rectal cancer, and the main symptoms include cancer breakout infection, narrowing of intestinal lumen and external invasion. 1. Symptoms of cancer breakage and infection: blood on fecal surface is the most common symptom of rectal cancer, which is caused by tumor breakage and bleeding, accounting for about 80%. When complicated with infection, it can be realized as mucous pus and blood stool. 2. Intestinal stenosis: the main symptom is that the feces are deformed and thin. When the disease progresses, abdominal pain, abdominal distension, difficulty in defecation and other manifestations of intestinal obstruction can appear. If the tumor involves the anal sphincter, there can be the feeling of pain near the anus. 3. External invasion symptoms: when the tumor continues to progress and deteriorate, and invades the prostate and bladder, frequent urination, painful urination, hematuria and difficulty in urination can occur. When the tumor invades the sacral plexus, persistent severe pain in the sacrococcygeal area may appear.