Blood in diaper which is minimal may not be a serious problem as long as the baby is growing well. It could be due to 1. minute trauma in mothers nipple which the baby might be swallowing 2. minute tear in the rectal region which could happen when the baby passes a bit of hard stools 3. Diaper rash
if a bit severe can lead to blood. TO be on the safer side just discuss with your pediatrician
on your next visit. But till then need not worry much.
Dr. Balaji Chinnasami MD
Assistant professor Pediatrics