Bowel cancer does not always involve left-sided abdominal pain, but can also present with right-sided or full abdominal pain. Patients with colorectal cancer can have no obvious symptoms in the early stage, when the tumor grows to a certain degree, different clinical manifestations can appear according to different growth sites. For right half colon cancer, 70%-80% of patients will have abdominal pain, mostly hidden pain, which can be on the right side of the abdomen or on the whole abdomen, etc. Other symptoms include anemia, abdominal mass and intestinal obstruction. For left half colon cancer, more than 70% of patients will have blood in stool. Statistics show that about 60% of patients will have abdominal pain, which is also hidden in nature, and the site can be the left side or other parts of the abdomen. If you feel unwell, please seek medical examination in time for early prevention, early diagnosis and early treatment.