I had a hard stool saw blood in bowl. hour later went again it was soft saw,nothing. why does this happen? 42 yr old male no history colon cancer in f

Get a check up: Blood in your stools can be a serious problem but it isn't always. It could be due to such things as ulcers, colitis, or cancer. So to be on the safe side you should get a complete check up as soon as possible at a medical clinic or office near you. A complete history and physical is needed for a start and than some tests may be ordered.