Screening options vary. Some tests can be completed at home, while others involve examination of the colon. If a screening test such as certain stool tests is abnormal, a colonoscopy may be needed for further evaluation. Centers for Disease Control
## Don’t Wait for Pain
Another misconception is that cancer must cause severe pain before it becomes important.
That is not necessarily true.
The NCI notes that cancer does not always cause pain and advises people with symptoms that persist for a couple of weeks to speak with a doctor. Institut National du Cancer
This is why changes such as bleeding, persistent bowel problems, unexplained weight loss, or ongoing fatigue should not simply be ignored because they are not painful.
At the same time, there is no need to panic every time your digestion changes.
The goal is awareness—not fear.
## What Should You Do If You Notice These Signs?
If you experience one of these symptoms, try not to diagnose yourself.
