My 8.5 year old CIRCUMCISIZED son has blood also. It is only after he urinates and often leaves small drops of blood in his underwear. He has zero pain or burning.
5 months ago he told me about it and I freaked out after reading on the internet. I took him to a pediatric urologist. They did blood, urine, ultrasound and x-ray (tests) and there was no issue other than severe constipation. The doc showed me on the x-ray that he colon was backed up with stool. It was evident.
He sent me home, told my son to drink lots of water (we live in AZ) and to get fiber. He explained it that the colon being that backed up would rub against his urethra like a brillo pad creating an internal sore. Nothing to worry about, getting him "regular" would eventually correct the problem. The blood was from the internal sore.
It has been a full 5 months and he has had long periods of no blood, but recently I found his underwear with several spots, enough to make another appt. The doctor agreed and they are going in with a camera.
Has anyone else had a diagnosis? I am really nervous today.