Anal cancer is mainly a malignant tumor occurring in the rectal and anal area of patients, including rectal cancer and anal canal cancer. 1. Rectal cancer: Patients with early rectal cancer usually have no obvious symptoms, and as the tumor increases, they may have symptoms such as change in bowel habits, bloody stool, pus-blood stool, urgency, constipation and diarrhea, which may be accompanied by the feeling of anal drop and incomplete stool, and some patients may have thinning stool. 2. Anal canal cancer: Anal canal cancer is more common in women. Patients’ symptoms are not obvious in the early stage of the disease, but in the progress stage, they may show anal pain, anal itching and change of bowel habits. There may be raised swelling, itching, pain, ulceration and other symptoms. The surface of swelling is not smooth, granular and easy to bleed when touched, usually accompanied by enlarged inguinal lymph nodes. Anal cancer is usually treated by surgical resection of the tumor, supplemented by chemotherapy and radiotherapy, etc. The cure rate of early anal cancer is high. If symptoms such as poor appetite, constipation, indigestion and change in bowel habits occur, it is recommended to go to hospital for colonoscopy to rule out whether anorectal malignant tumor is present. As far as possible, early detection, early diagnosis and early treatment can be achieved so as to obtain certain treatment effect.