Does Colon cancer affect a person's digestive system? How bad does it get as colon cancer progresses?

Colon cancer is cancer that affects the part of digestive system. So definitely effects a persons digestive system. Some of the colon cancer symptoms are Blood (usually dark red or black) in the stool, Constipation and diarrhea, Long, thin, pencil-like stools, Fatigue and weakness, Abdominal pain or bloating, Unexplained weight loss. These symptoms worsens as the colon cancer progresses.

Consult an oncologist, who on examining the patient will answer all your queries. Hope our answer helps you.