5 Early Warning Symptoms That Could Point to Colon Cancer

Like many cancers, colon cancer can produce symptoms that are either mild or severe and sometimes resemble other illnesses. It remains one of the leading causes of cancer deaths, following lung cancer, and gained renewed public attention after the death of Chadwick Boseman at age 43.

Routine screening traditionally begins around age 50, though many experts now recommend starting at 45. Even so, cases are increasingly being diagnosed in people in their 20s and 30s.

When detected early, colon cancer is often treatable with strong survival rates. Knowing the warning signs is crucial, especially for those with a family history or unusual symptoms.

Unexplained weight loss can be a red flag. Tumors consume nutrients and may alter metabolism, leading to noticeable weight changes without dieting.

Persistent abdominal pain, cramping, or excessive gas should also be evaluated. Growths in the colon can cause irritation, inflammation, and discomfort.

Blood in the stool—whether bright red or dark—along with unusually thin stools may signal a serious issue. Ongoing constipation or sudden bowel changes can also occur if a blockage develops. Additionally, tumors may cause iron-deficiency anemia, leading to fatigue, weakness, or heart palpitations.

Risk factors include genetics, poor diet, inactivity, smoking, obesity, and inflammatory bowel diseases like Crohn’s disease. A fiber-rich diet, regular exercise, and medical guidance can reduce risk. Treatments may involve surgery, chemotherapy, or radiation, depending on the stage.