Bowel cancer is one of the more common digestive tract cancers. Clinically, colonoscopy is the most accurate and effective means to diagnose bowel cancer. If patients don’t want to do colonoscopy, they can also use stool genetic examination and tumor four tests to preliminarily exclude bowel cancer. 1. Stool genetic examination: clinically, stool examination can be used to assist in the diagnosis of intestinal cancer. Generally speaking, there will be some gene mutations when cancer occurs in the intestines, and some tumor cells may be shed during the process of cancer, so DNA test can be carried out on the patient’s stool. 2. Four tests for digestive tract tumors: the sensitivity of serum tumor markers for tumor diagnosis is relatively high, and generally it can be combined with four tumor markers for digestive tract tumors, such as CEA, AFP, CA19-9, CA242, etc., to initially diagnose whether there is digestive tract cancer or not. According to the statistics, the incidence rate of intestinal cancer is only second to stomach cancer and lung cancer. It is suggested that everyone should develop the habit of regular medical checkups, so as to achieve early detection, early diagnosis and early treatment, and to improve the quality of their lives.