Having a bowel movement once a day does not increase the risk of bowel cancer. Having a bowel movement once a day means that your bowels are clear and you are not experiencing constipation. Constipation is a risk factor for bowel cancer because in constipated patients, long-term constipation can lead to an increase in the release of toxic substances from the bowel, increasing the risk of bowel cancer. Therefore, you should usually eat more food containing dietary fiber such as konjac flour, hawthorn, dragon fruit and so on. Apart from constipation, other causes of bowel cancer include ageing, colorectal adenoma, ulcerative colitis, polyposis, chronic colorectal inflammation, overweight and high-fat diet. If you have any of these risk factors, you should be screened regularly for bowel cancer, so that problems can be detected early and prevented before they occur.