my daughter is 18 month old.every day she do her poop normally. today she did her poop normally but I noticed 3/4 blood strand in it.she have no pain at all.I am worried about it

A. If the motion was normal without any hassle then blood can be assigned for stomach infection or protein allergy we cannot be sure about it so you can check with the doctor but either of the two situations are very commonly associated with this