Colorectal cancer rarely causes any symptoms at first, but when it does, they include: • Change in bowel habits such as diarrhea and constipation • Frequent gas pains or stomach pains • Blood in bowel movements • Low iron level • Feeling tired or weak • Dark or black-colored stool The symptoms tend to vary from person to person and individuals usually don’t have any symptoms until CRC is advanced, hence why regular screening is crucial.