The main causes of rectal cancer are: 1, dietary factors: the so-called western-style diet with high fat, high protein and low fiber is considered to be related to the occurrence of rectal cancer; 2, adenoma canceration: redundant polyps can canceration, adenoma can be divided into tubular adenoma, villous adenoma, mixed adenoma. The incidence of tubular adenoma is high, and the canceration rate of villous adenoma is high. 3. Genetic factors: Many families of rectal cancer patients have a family history of cancer and many digestive tract tumors. Because the genes of normal cells change, cancer patients gain genetic susceptibility, and some stimulating factors make tissue cells grow rapidly, which will develop into cancer; 4, inflammatory bowel disease: ulcerative colitis and Crohn's disease. Due to the destruction of intestinal mucosa, ulcer repair and proliferation, granulation tissue becomes cancerous, Schistosoma eggs are deposited in rectal mucosa, and chronic inflammation stimulates canceration. To prevent rectal cancer, besides paying attention to diet care and regular physical examination, you can also exercise regularly every day to enhance your physique; You can also use ginseng essence Rh2 to regulate and enhance immunity, which can inhibit cancer cells and help prevent cancer.