March is colorectal cancer awareness month. Because my sister died much too young of colon cancer that likely went undetected for years before she felt sick enough to get it checkout out (and by then it was too late), I'm spreading the word that all eligible people should get screened. She was 43 when she was diagnosed, and our family history was too spotty (rumors that grandma had something removed from her colon years ago) to prompt us to get early screenings.
At the tender age of 46, I've had two colonoscopies, and both have found nothing amiss. Yes, the prep is unpleasant, but not painful. Don't plan any errands for this time. The first one I had about a month after Kris was diagnosed, which set me up for the every-five-years plan. The second one was normal as well, and this brings me a peace of mind because immediate family members of colon cancer victims are at a higher risk of developing the disease themselves.
The thing about colon cancer is that it is relatively easy (once you get the camera in there) to diagnose and treat IF it's caught early. That's why getting a colonoscopy is so important. This link is from a young woman who had symptoms for a few years before her cancer was discovered and treated. It contains the expected joke or two that involves the backside, just so you're ready. The CDC has a page as well that describes who should get screened and how it works.