The chance of developing bowel cancer in the twenties is still relatively low, but for people with a family history of bowel cancer, colonoscopy screening should also be carried out to avoid rare bowel cancer. Bowel cancer is a common malignant tumor of the digestive system, and the incidence rate increases with age, so bowel cancer in the twenties is relatively rare. However, there are still a small number of bowel cancer patients in their twenties or even younger. When there is a family history of bowel cancer, or when there is blood in the stool, or when there is a change in bowel habit, such as an increase in the number of bowel movements, or when there is a change in the shape of bowel movement, a colonoscopy screening may be considered. Although young people are less likely to develop bowel cancer, they still need to be vigilant.