The early stages of colorectal cancer may not cause any symptoms, but as the cancer grows, symptoms may include changes in bowel habits (such as diarrhea or constipation), rectal bleeding, abdominal pain or cramping, weakness or fatigue, and unexplained weight loss.
The exact cause of colorectal cancer is not fully understood, but there are several factors that can increase a person's risk, including age, family history of colorectal cancer, certain genetic mutations, a history of inflammatory bowel disease, and a diet high in red meat and low in fiber.
Treatment for colorectal cancer may include surgery, radiation therapy, chemotherapy, targeted therapy, or a combination of these treatments, depending on the stage and severity of the cancer.