There are many causes of bowel cancer, the more common one is that the balance between oncogenes and oncogenes in the patient’s body is broken, and the patient will develop into bowel cancer in a long time. In addition, it may also be related to the patient’s diet. If the patient often eats fine food and food with high fat content, it may lead to colorectal cancer, and it is recommended that the patient should eat more coarse food, food with high fiber content, or fresh vegetables and fruits. In addition, it may also be related to the patient’s heredity. If there is bowel cancer in the patient’s immediate family, such as the patient’s siblings or parents have bowel cancer, the patient’s own possibility of bowel cancer will increase, so patients over 40 years old need to go to the hospital for regular checkups. It may also be related to polyps inside the patient’s intestine, especially villous adenoma, which may develop into bowel cancer after a long time. Therefore, if a polyp or adenoma is found in the intestine during colonoscopy, it should be removed surgically as much as possible, for example, under colonoscopy, or if it is difficult to operate under colonoscopy, laparoscopic surgery should be considered to remove it.