According to the Mayo Clinic signs and symptoms of colon cancer include:
- A persistent change in your bowel habits, including diarrhea or constipation or a change in the consistency of your stool.
- Rectal bleeding or blood in your stool
- Persistent abdominal discomfort, such as cramps, gas or pain.
- A feeling that your bowel doesn't empty completely.
- Weakness or fatigue.
- Unexplained weight loss.
But many people with colon cancer can experience no symptoms in the early stages of the disease, according to the Mayo Clinic. When symptoms appear they often vary, depending on the cancer's size and location in your large intestine.
When to see a doctor
If you notice any persistent symptoms that worry you, make an appointment with your doctor.
Talk with your doctor about when to begin colon cancer screening, the Mayo Clinic posts on its website.