Is blood in my 3 year old’s stool a normal problem to encounter?

Sometimes. It’s not uncommon for children to get constipated, then “force” themselves to poop. The force and hardness of their stool can cause a crack or “fissure” in the skin lining around the rectum, and cause bleeding. If this happens once or twice, then it’s not a big deal, but if this is an ongoing problem, your child should be seen by a physician to determine its severity, and what can be done. Sincerely, Mike to help.