The most obvious symptom of bowel cancer is the change of bowel habit, such as the change of stool shape, the increase of stool frequency and blood in stool, etc. Once these symptoms appear, patients are advised to consult the doctor in time for treatment. The most obvious symptoms of bowel cancer in early stage are change of stool shape and increase of stool frequency, because the tumor in the intestine will block the intestine, which will lead to thinning of stool. However, as the tumor grows, the intestines will be completely blocked and symptoms of intestinal obstruction such as abdominal pain, bloating, nausea, vomiting and stopping of bowel movement will occur. Bowel cancer patients may also have the symptom of blood in stool. If there is no blood in stool, it is recommended to further improve the fecal occult blood test, if the test result is positive, it suggests that there is blood in stool, and the patient should further improve the colonoscopy. If the patient has the symptoms of intestinal cancer, it is recommended to consult doctor for examination and reasonable treatment under doctor’s guidance, so as to avoid delaying the condition and causing serious adverse effects to the body.