Back pain can be a symptom of colon and rectal cancer and most commonly occurs after the malignancy has spread, according to the American Cancer Society. As a colon tumor grows, it may become so large that it pushes against nerves and organs, which in turn causes pain.
Additional symptoms of colon cancer include bloody stools, stomach cramps and weight loss, explains Mayo Clinic. Individuals may also experience diarrhea and constipation. It is also common for individuals not to experience any symptoms in the early stages of the disease, which is why regular colon cancer screenings are essential. The recommended age for regular screenings is 50; however, certain individuals may be advised to begin at an earlier age, especially if cancer runs in the family.