Re: Blood in childs stool
Bright red means fresh, which may come from a scratch of the anus due to hard stools or scratchy foods passing thru. Watch his diet, serve only non scratching type foods for a while and see if this corrects the problem, as well as determining whether he has a constipation problem.
Blood from a scratch will be more on the outside of the stool rather than inside middle of a stool.
It could also mean your son may have decided to investigate a little and caused a scratch/tear of the skin.
You would be wise to take him to the doctor, not ER, if this happens again.
Dark blood indicates internal bleeding, and an ER visit would be merited if you could not get in touch with his doctor.
My comments are based on the bleeding to be a small amount, not a flow of blood, or lots of blood.
Note: I am not a medical professional. Speak from experinece only.